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Finding the Fourth Proportional to 1,142.93, 1,714.79 and 402.65

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Solution

The fourth proportional to 1,142.93, 1,714.79 and 402.65 is: 604.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.93 : 1,714.79 = 402.65 : x
  2. Step 2: Convert to fraction form
    1,142.93/1,714.79 = 402.65/x
  3. Step 3: Cross multiply
    1,142.93x = 1,714.79 × 402.65
  4. Step 4: Simplify right side
    1,142.93x = 690,449.61
  5. Step 5: Solve for x
    x = 690,449.61/1,142.93
  6. Step 6: Final answer
    x = 604.11

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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.