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Finding the Fourth Proportional to 1,686.65, 2,531.10 and 591.02

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Solution

The fourth proportional to 1,686.65, 2,531.10 and 591.02 is: 886.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.65 : 2,531.10 = 591.02 : x
  2. Step 2: Convert to fraction form
    1,686.65/2,531.10 = 591.02/x
  3. Step 3: Cross multiply
    1,686.65x = 2,531.10 × 591.02
  4. Step 4: Simplify right side
    1,686.65x = 1,495,918.07
  5. Step 5: Solve for x
    x = 1,495,918.07/1,686.65
  6. Step 6: Final answer
    x = 886.92

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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.