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Finding the Fourth Proportional to 607,119.20, 910,678.80 and 489,021.20

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Solution

The fourth proportional to 607,119.20, 910,678.80 and 489,021.20 is: 733,531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,119.20 : 910,678.80 = 489,021.20 : x
  2. Step 2: Convert to fraction form
    607,119.20/910,678.80 = 489,021.20/x
  3. Step 3: Cross multiply
    607,119.20x = 910,678.80 × 489,021.20
  4. Step 4: Simplify right side
    607,119.20x = 445,341,239,590.56
  5. Step 5: Solve for x
    x = 445,341,239,590.56/607,119.20
  6. Step 6: Final answer
    x = 733,531.80

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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.