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Finding the Fourth Proportional to 487,630.20, 731,445.30 and 480,631.80

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Solution

The fourth proportional to 487,630.20, 731,445.30 and 480,631.80 is: 720,947.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,630.20 : 731,445.30 = 480,631.80 : x
  2. Step 2: Convert to fraction form
    487,630.20/731,445.30 = 480,631.80/x
  3. Step 3: Cross multiply
    487,630.20x = 731,445.30 × 480,631.80
  4. Step 4: Simplify right side
    487,630.20x = 351,555,871,140.54
  5. Step 5: Solve for x
    x = 351,555,871,140.54/487,630.20
  6. Step 6: Final answer
    x = 720,947.70

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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.