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Finding the Fourth Proportional to 465,411.32, 642,343.84 and 387,763.88

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Solution

The fourth proportional to 465,411.32, 642,343.84 and 387,763.88 is: 535,177.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,411.32 : 642,343.84 = 387,763.88 : x
  2. Step 2: Convert to fraction form
    465,411.32/642,343.84 = 387,763.88/x
  3. Step 3: Cross multiply
    465,411.32x = 642,343.84 × 387,763.88
  4. Step 4: Simplify right side
    465,411.32x = 249,077,739,692.50
  5. Step 5: Solve for x
    x = 249,077,739,692.50/465,411.32
  6. Step 6: Final answer
    x = 535,177.66

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1.5x scale

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.