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Finding the Fourth Proportional to 2,365.32, 3,547.98 and 721.88

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Solution

The fourth proportional to 2,365.32, 3,547.98 and 721.88 is: 1,082.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,365.32 : 3,547.98 = 721.88 : x
  2. Step 2: Convert to fraction form
    2,365.32/3,547.98 = 721.88/x
  3. Step 3: Cross multiply
    2,365.32x = 3,547.98 × 721.88
  4. Step 4: Simplify right side
    2,365.32x = 2,561,215.80
  5. Step 5: Solve for x
    x = 2,561,215.80/2,365.32
  6. Step 6: Final answer
    x = 1,082.82

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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.