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Finding the Fourth Proportional to 1,141.29, 1,712.65 and 655.29

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Solution

The fourth proportional to 1,141.29, 1,712.65 and 655.29 is: 983.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.29 : 1,712.65 = 655.29 : x
  2. Step 2: Convert to fraction form
    1,141.29/1,712.65 = 655.29/x
  3. Step 3: Cross multiply
    1,141.29x = 1,712.65 × 655.29
  4. Step 4: Simplify right side
    1,141.29x = 1,122,282.42
  5. Step 5: Solve for x
    x = 1,122,282.42/1,141.29
  6. Step 6: Final answer
    x = 983.35

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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.