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Finding the Fourth Proportional to 1,587.86, 2,191.37 and 924.47

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Solution

The fourth proportional to 1,587.86, 2,191.37 and 924.47 is: 1,275.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.86 : 2,191.37 = 924.47 : x
  2. Step 2: Convert to fraction form
    1,587.86/2,191.37 = 924.47/x
  3. Step 3: Cross multiply
    1,587.86x = 2,191.37 × 924.47
  4. Step 4: Simplify right side
    1,587.86x = 2,025,853.66
  5. Step 5: Solve for x
    x = 2,025,853.66/1,587.86
  6. Step 6: Final answer
    x = 1,275.84

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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.