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Finding the Fourth Proportional to 1,432.29, 2,147.38 and 651.88

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Solution

The fourth proportional to 1,432.29, 2,147.38 and 651.88 is: 977.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.29 : 2,147.38 = 651.88 : x
  2. Step 2: Convert to fraction form
    1,432.29/2,147.38 = 651.88/x
  3. Step 3: Cross multiply
    1,432.29x = 2,147.38 × 651.88
  4. Step 4: Simplify right side
    1,432.29x = 1,399,834.07
  5. Step 5: Solve for x
    x = 1,399,834.07/1,432.29
  6. Step 6: Final answer
    x = 977.34

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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.