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Finding the Fourth Proportional to 474.45, 710.90 and 291.46

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Solution

The fourth proportional to 474.45, 710.90 and 291.46 is: 436.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.45 : 710.90 = 291.46 : x
  2. Step 2: Convert to fraction form
    474.45/710.90 = 291.46/x
  3. Step 3: Cross multiply
    474.45x = 710.90 × 291.46
  4. Step 4: Simplify right side
    474.45x = 207,198.91
  5. Step 5: Solve for x
    x = 207,198.91/474.45
  6. Step 6: Final answer
    x = 436.71

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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.