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Finding the Fourth Proportional to 750.79, 1,126.90 and 366.31

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Solution

The fourth proportional to 750.79, 1,126.90 and 366.31 is: 549.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.79 : 1,126.90 = 366.31 : x
  2. Step 2: Convert to fraction form
    750.79/1,126.90 = 366.31/x
  3. Step 3: Cross multiply
    750.79x = 1,126.90 × 366.31
  4. Step 4: Simplify right side
    750.79x = 412,788.19
  5. Step 5: Solve for x
    x = 412,788.19/750.79
  6. Step 6: Final answer
    x = 549.81

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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.