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Finding the Fourth Proportional to 691.17, 953.85 and 429.18

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Solution

The fourth proportional to 691.17, 953.85 and 429.18 is: 592.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.17 : 953.85 = 429.18 : x
  2. Step 2: Convert to fraction form
    691.17/953.85 = 429.18/x
  3. Step 3: Cross multiply
    691.17x = 953.85 × 429.18
  4. Step 4: Simplify right side
    691.17x = 409,373.34
  5. Step 5: Solve for x
    x = 409,373.34/691.17
  6. Step 6: Final answer
    x = 592.29

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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.