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Finding the Fourth Proportional to 951.99, 1,427.96 and 431.62

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Solution

The fourth proportional to 951.99, 1,427.96 and 431.62 is: 647.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.99 : 1,427.96 = 431.62 : x
  2. Step 2: Convert to fraction form
    951.99/1,427.96 = 431.62/x
  3. Step 3: Cross multiply
    951.99x = 1,427.96 × 431.62
  4. Step 4: Simplify right side
    951.99x = 616,336.10
  5. Step 5: Solve for x
    x = 616,336.10/951.99
  6. Step 6: Final answer
    x = 647.42

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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.