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Finding the Fourth Proportional to 487,385.20, 731,077.80 and 487,385.20

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Solution

The fourth proportional to 487,385.20, 731,077.80 and 487,385.20 is: 731,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,385.20 : 731,077.80 = 487,385.20 : x
  2. Step 2: Convert to fraction form
    487,385.20/731,077.80 = 487,385.20/x
  3. Step 3: Cross multiply
    487,385.20x = 731,077.80 × 487,385.20
  4. Step 4: Simplify right side
    487,385.20x = 356,316,499,768.56
  5. Step 5: Solve for x
    x = 356,316,499,768.56/487,385.20
  6. Step 6: Final answer
    x = 731,077.80

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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.