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Finding the Fourth Proportional to 474.04, 709.84 and 392.64

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Solution

The fourth proportional to 474.04, 709.84 and 392.64 is: 587.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.04 : 709.84 = 392.64 : x
  2. Step 2: Convert to fraction form
    474.04/709.84 = 392.64/x
  3. Step 3: Cross multiply
    474.04x = 709.84 × 392.64
  4. Step 4: Simplify right side
    474.04x = 278,711.58
  5. Step 5: Solve for x
    x = 278,711.58/474.04
  6. Step 6: Final answer
    x = 587.95

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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.