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Finding the Fourth Proportional to 577,420.85, 866,116.70 and 156,685.79

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Solution

The fourth proportional to 577,420.85, 866,116.70 and 156,685.79 is: 235,024.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,420.85 : 866,116.70 = 156,685.79 : x
  2. Step 2: Convert to fraction form
    577,420.85/866,116.70 = 156,685.79/x
  3. Step 3: Cross multiply
    577,420.85x = 866,116.70 × 156,685.79
  4. Step 4: Simplify right side
    577,420.85x = 135,708,181,341.13
  5. Step 5: Solve for x
    x = 135,708,181,341.13/577,420.85
  6. Step 6: Final answer
    x = 235,024.73

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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.