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Finding the Fourth Proportional to 1,659.17, 2,487.86 and 877.20

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Solution

The fourth proportional to 1,659.17, 2,487.86 and 877.20 is: 1,315.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.17 : 2,487.86 = 877.20 : x
  2. Step 2: Convert to fraction form
    1,659.17/2,487.86 = 877.20/x
  3. Step 3: Cross multiply
    1,659.17x = 2,487.86 × 877.20
  4. Step 4: Simplify right side
    1,659.17x = 2,182,345.30
  5. Step 5: Solve for x
    x = 2,182,345.30/1,659.17
  6. Step 6: Final answer
    x = 1,315.33

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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.