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Finding the Fourth Proportional to 1,411.52, 2,117.37 and 487.17

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Solution

The fourth proportional to 1,411.52, 2,117.37 and 487.17 is: 730.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.52 : 2,117.37 = 487.17 : x
  2. Step 2: Convert to fraction form
    1,411.52/2,117.37 = 487.17/x
  3. Step 3: Cross multiply
    1,411.52x = 2,117.37 × 487.17
  4. Step 4: Simplify right side
    1,411.52x = 1,031,519.14
  5. Step 5: Solve for x
    x = 1,031,519.14/1,411.52
  6. Step 6: Final answer
    x = 730.79

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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.