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Finding the Fourth Proportional to 750.48, 1,125.03 and 688.98

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Solution

The fourth proportional to 750.48, 1,125.03 and 688.98 is: 1,032.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.48 : 1,125.03 = 688.98 : x
  2. Step 2: Convert to fraction form
    750.48/1,125.03 = 688.98/x
  3. Step 3: Cross multiply
    750.48x = 1,125.03 × 688.98
  4. Step 4: Simplify right side
    750.48x = 775,123.17
  5. Step 5: Solve for x
    x = 775,123.17/750.48
  6. Step 6: Final answer
    x = 1,032.84

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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.