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Finding the Fourth Proportional to 691.24, 954.18 and 458.28

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Solution

The fourth proportional to 691.24, 954.18 and 458.28 is: 632.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.24 : 954.18 = 458.28 : x
  2. Step 2: Convert to fraction form
    691.24/954.18 = 458.28/x
  3. Step 3: Cross multiply
    691.24x = 954.18 × 458.28
  4. Step 4: Simplify right side
    691.24x = 437,281.61
  5. Step 5: Solve for x
    x = 437,281.61/691.24
  6. Step 6: Final answer
    x = 632.60

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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.