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Finding the Fourth Proportional to 1,240.80, 1,862.08 and 591.68

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Solution

The fourth proportional to 1,240.80, 1,862.08 and 591.68 is: 887.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.80 : 1,862.08 = 591.68 : x
  2. Step 2: Convert to fraction form
    1,240.80/1,862.08 = 591.68/x
  3. Step 3: Cross multiply
    1,240.80x = 1,862.08 × 591.68
  4. Step 4: Simplify right side
    1,240.80x = 1,101,755.49
  5. Step 5: Solve for x
    x = 1,101,755.49/1,240.80
  6. Step 6: Final answer
    x = 887.94

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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.