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Finding the Fourth Proportional to 610,480.20, 915,720.30 and 545,161.80

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Solution

The fourth proportional to 610,480.20, 915,720.30 and 545,161.80 is: 817,742.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,480.20 : 915,720.30 = 545,161.80 : x
  2. Step 2: Convert to fraction form
    610,480.20/915,720.30 = 545,161.80/x
  3. Step 3: Cross multiply
    610,480.20x = 915,720.30 × 545,161.80
  4. Step 4: Simplify right side
    610,480.20x = 499,215,727,044.54
  5. Step 5: Solve for x
    x = 499,215,727,044.54/610,480.20
  6. Step 6: Final answer
    x = 817,742.70

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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.