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Finding the Fourth Proportional to 749.98, 1,035.15 and 487.54

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Solution

The fourth proportional to 749.98, 1,035.15 and 487.54 is: 672.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.98 : 1,035.15 = 487.54 : x
  2. Step 2: Convert to fraction form
    749.98/1,035.15 = 487.54/x
  3. Step 3: Cross multiply
    749.98x = 1,035.15 × 487.54
  4. Step 4: Simplify right side
    749.98x = 504,677.03
  5. Step 5: Solve for x
    x = 504,677.03/749.98
  6. Step 6: Final answer
    x = 672.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.