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Finding the Fourth Proportional to 688,139.01, 949,691.79 and 382,274.91

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Solution

The fourth proportional to 688,139.01, 949,691.79 and 382,274.91 is: 527,572.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,139.01 : 949,691.79 = 382,274.91 : x
  2. Step 2: Convert to fraction form
    688,139.01/949,691.79 = 382,274.91/x
  3. Step 3: Cross multiply
    688,139.01x = 949,691.79 × 382,274.91
  4. Step 4: Simplify right side
    688,139.01x = 363,043,343,549.99
  5. Step 5: Solve for x
    x = 363,043,343,549.99/688,139.01
  6. Step 6: Final answer
    x = 527,572.68

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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.