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Finding the Fourth Proportional to 1,240.59, 1,859.29 and 547.07

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Solution

The fourth proportional to 1,240.59, 1,859.29 and 547.07 is: 819.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.59 : 1,859.29 = 547.07 : x
  2. Step 2: Convert to fraction form
    1,240.59/1,859.29 = 547.07/x
  3. Step 3: Cross multiply
    1,240.59x = 1,859.29 × 547.07
  4. Step 4: Simplify right side
    1,240.59x = 1,017,161.78
  5. Step 5: Solve for x
    x = 1,017,161.78/1,240.59
  6. Step 6: Final answer
    x = 819.90

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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.