Home / 1,587.72-2,381.40-492.09

Finding the Fourth Proportional to 1,587.72, 2,381.40 and 492.09

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Solution

The fourth proportional to 1,587.72, 2,381.40 and 492.09 is: 738.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.72 : 2,381.40 = 492.09 : x
  2. Step 2: Convert to fraction form
    1,587.72/2,381.40 = 492.09/x
  3. Step 3: Cross multiply
    1,587.72x = 2,381.40 × 492.09
  4. Step 4: Simplify right side
    1,587.72x = 1,171,863.13
  5. Step 5: Solve for x
    x = 1,171,863.13/1,587.72
  6. Step 6: Final answer
    x = 738.08

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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.