Home / 1,551.38-2,327.87-686.30

Finding the Fourth Proportional to 1,551.38, 2,327.87 and 686.30

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Solution

The fourth proportional to 1,551.38, 2,327.87 and 686.30 is: 1,029.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.38 : 2,327.87 = 686.30 : x
  2. Step 2: Convert to fraction form
    1,551.38/2,327.87 = 686.30/x
  3. Step 3: Cross multiply
    1,551.38x = 2,327.87 × 686.30
  4. Step 4: Simplify right side
    1,551.38x = 1,597,617.18
  5. Step 5: Solve for x
    x = 1,597,617.18/1,551.38
  6. Step 6: Final answer
    x = 1,029.80

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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.