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Finding the Fourth Proportional to 1,686.85, 2,531.39 and 591.21

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Solution

The fourth proportional to 1,686.85, 2,531.39 and 591.21 is: 887.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.85 : 2,531.39 = 591.21 : x
  2. Step 2: Convert to fraction form
    1,686.85/2,531.39 = 591.21/x
  3. Step 3: Cross multiply
    1,686.85x = 2,531.39 × 591.21
  4. Step 4: Simplify right side
    1,686.85x = 1,496,583.08
  5. Step 5: Solve for x
    x = 1,496,583.08/1,686.85
  6. Step 6: Final answer
    x = 887.21

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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.