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Finding the Fourth Proportional to 1,631.16, 2,447.10 and 477

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Solution

The fourth proportional to 1,631.16, 2,447.10 and 477 is: 715.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.16 : 2,447.10 = 477 : x
  2. Step 2: Convert to fraction form
    1,631.16/2,447.10 = 477/x
  3. Step 3: Cross multiply
    1,631.16x = 2,447.10 × 477
  4. Step 4: Simplify right side
    1,631.16x = 1,167,266.70
  5. Step 5: Solve for x
    x = 1,167,266.70/1,631.16
  6. Step 6: Final answer
    x = 715.61

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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.