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Finding the Fourth Proportional to 607,211.20, 910,816.80 and 489,113.20

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Solution

The fourth proportional to 607,211.20, 910,816.80 and 489,113.20 is: 733,669.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,211.20 : 910,816.80 = 489,113.20 : x
  2. Step 2: Convert to fraction form
    607,211.20/910,816.80 = 489,113.20/x
  3. Step 3: Cross multiply
    607,211.20x = 910,816.80 × 489,113.20
  4. Step 4: Simplify right side
    607,211.20x = 445,492,519,661.76
  5. Step 5: Solve for x
    x = 445,492,519,661.76/607,211.20
  6. Step 6: Final answer
    x = 733,669.80

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Double scale
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Similar ratio
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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.