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Finding the Fourth Proportional to 607,218.20, 910,827.30 and 489,120.20

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Solution

The fourth proportional to 607,218.20, 910,827.30 and 489,120.20 is: 733,680.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,218.20 : 910,827.30 = 489,120.20 : x
  2. Step 2: Convert to fraction form
    607,218.20/910,827.30 = 489,120.20/x
  3. Step 3: Cross multiply
    607,218.20x = 910,827.30 × 489,120.20
  4. Step 4: Simplify right side
    607,218.20x = 445,504,031,141.46
  5. Step 5: Solve for x
    x = 445,504,031,141.46/607,218.20
  6. Step 6: Final answer
    x = 733,680.30

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Half scale
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Double scale
Find fourth proportional to 607,219.20, 910,828.80 and 489,121.20
Similar ratio
Find fourth proportional to 910,827.30, 1,366,240.95 and 733,680.30
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.