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Finding the Fourth Proportional to 1,147.55, 1,721.01 and 498.13

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Solution

The fourth proportional to 1,147.55, 1,721.01 and 498.13 is: 747.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.55 : 1,721.01 = 498.13 : x
  2. Step 2: Convert to fraction form
    1,147.55/1,721.01 = 498.13/x
  3. Step 3: Cross multiply
    1,147.55x = 1,721.01 × 498.13
  4. Step 4: Simplify right side
    1,147.55x = 857,278.11
  5. Step 5: Solve for x
    x = 857,278.11/1,147.55
  6. Step 6: Final answer
    x = 747.05

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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.