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Finding the Fourth Proportional to 750.91, 1,126.47 and 263.89

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Solution

The fourth proportional to 750.91, 1,126.47 and 263.89 is: 395.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.91 : 1,126.47 = 263.89 : x
  2. Step 2: Convert to fraction form
    750.91/1,126.47 = 263.89/x
  3. Step 3: Cross multiply
    750.91x = 1,126.47 × 263.89
  4. Step 4: Simplify right side
    750.91x = 297,264.17
  5. Step 5: Solve for x
    x = 297,264.17/750.91
  6. Step 6: Final answer
    x = 395.87

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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.