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Finding the Fourth Proportional to 687,866, 949,255.08 and 386,060

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Solution

The fourth proportional to 687,866, 949,255.08 and 386,060 is: 532,762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,866 : 949,255.08 = 386,060 : x
  2. Step 2: Convert to fraction form
    687,866/949,255.08 = 386,060/x
  3. Step 3: Cross multiply
    687,866x = 949,255.08 × 386,060
  4. Step 4: Simplify right side
    687,866x = 366,469,416,184.80
  5. Step 5: Solve for x
    x = 366,469,416,184.80/687,866
  6. Step 6: Final answer
    x = 532,762.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.