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Finding the Fourth Proportional to 1,139.79, 1,711.16 and 592.35

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Solution

The fourth proportional to 1,139.79, 1,711.16 and 592.35 is: 889.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.79 : 1,711.16 = 592.35 : x
  2. Step 2: Convert to fraction form
    1,139.79/1,711.16 = 592.35/x
  3. Step 3: Cross multiply
    1,139.79x = 1,711.16 × 592.35
  4. Step 4: Simplify right side
    1,139.79x = 1,013,611.30
  5. Step 5: Solve for x
    x = 1,013,611.30/1,139.79
  6. Step 6: Final answer
    x = 889.30

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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.