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Finding the Fourth Proportional to 519,221.10, 778,831.65 and 487,728.30

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Solution

The fourth proportional to 519,221.10, 778,831.65 and 487,728.30 is: 731,592.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,221.10 : 778,831.65 = 487,728.30 : x
  2. Step 2: Convert to fraction form
    519,221.10/778,831.65 = 487,728.30/x
  3. Step 3: Cross multiply
    519,221.10x = 778,831.65 × 487,728.30
  4. Step 4: Simplify right side
    519,221.10x = 379,858,236,640.70
  5. Step 5: Solve for x
    x = 379,858,236,640.70/519,221.10
  6. Step 6: Final answer
    x = 731,592.45

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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.