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Finding the Fourth Proportional to 2,365.03, 3,547.31 and 721.61

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Solution

The fourth proportional to 2,365.03, 3,547.31 and 721.61 is: 1,082.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,365.03 : 3,547.31 = 721.61 : x
  2. Step 2: Convert to fraction form
    2,365.03/3,547.31 = 721.61/x
  3. Step 3: Cross multiply
    2,365.03x = 3,547.31 × 721.61
  4. Step 4: Simplify right side
    2,365.03x = 2,559,753.02
  5. Step 5: Solve for x
    x = 2,559,753.02/2,365.03
  6. Step 6: Final answer
    x = 1,082.34

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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.