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Finding the Fourth Proportional to 750.72, 1,126.76 and 404.34

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Solution

The fourth proportional to 750.72, 1,126.76 and 404.34 is: 606.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.72 : 1,126.76 = 404.34 : x
  2. Step 2: Convert to fraction form
    750.72/1,126.76 = 404.34/x
  3. Step 3: Cross multiply
    750.72x = 1,126.76 × 404.34
  4. Step 4: Simplify right side
    750.72x = 455,592.12
  5. Step 5: Solve for x
    x = 455,592.12/750.72
  6. Step 6: Final answer
    x = 606.87

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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.