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Finding the Fourth Proportional to 1,148.72, 1,723.08 and 499.76

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Solution

The fourth proportional to 1,148.72, 1,723.08 and 499.76 is: 749.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.72 : 1,723.08 = 499.76 : x
  2. Step 2: Convert to fraction form
    1,148.72/1,723.08 = 499.76/x
  3. Step 3: Cross multiply
    1,148.72x = 1,723.08 × 499.76
  4. Step 4: Simplify right side
    1,148.72x = 861,126.46
  5. Step 5: Solve for x
    x = 861,126.46/1,148.72
  6. Step 6: Final answer
    x = 749.64

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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.