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Finding the Fourth Proportional to 474.30, 709.82 and 400.86

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Solution

The fourth proportional to 474.30, 709.82 and 400.86 is: 599.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.30 : 709.82 = 400.86 : x
  2. Step 2: Convert to fraction form
    474.30/709.82 = 400.86/x
  3. Step 3: Cross multiply
    474.30x = 709.82 × 400.86
  4. Step 4: Simplify right side
    474.30x = 284,538.45
  5. Step 5: Solve for x
    x = 284,538.45/474.30
  6. Step 6: Final answer
    x = 599.91

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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.