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Finding the Fourth Proportional to 1,587.94, 2,191.36 and 925.17

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Solution

The fourth proportional to 1,587.94, 2,191.36 and 925.17 is: 1,276.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.94 : 2,191.36 = 925.17 : x
  2. Step 2: Convert to fraction form
    1,587.94/2,191.36 = 925.17/x
  3. Step 3: Cross multiply
    1,587.94x = 2,191.36 × 925.17
  4. Step 4: Simplify right side
    1,587.94x = 2,027,380.53
  5. Step 5: Solve for x
    x = 2,027,380.53/1,587.94
  6. Step 6: Final answer
    x = 1,276.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.