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Finding the Fourth Proportional to 686.40, 1,024.86 and 588.74

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Solution

The fourth proportional to 686.40, 1,024.86 and 588.74 is: 879.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.40 : 1,024.86 = 588.74 : x
  2. Step 2: Convert to fraction form
    686.40/1,024.86 = 588.74/x
  3. Step 3: Cross multiply
    686.40x = 1,024.86 × 588.74
  4. Step 4: Simplify right side
    686.40x = 603,376.08
  5. Step 5: Solve for x
    x = 603,376.08/686.40
  6. Step 6: Final answer
    x = 879.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.