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Finding the Fourth Proportional to 750.79, 1,125.67 and 360.77

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Solution

The fourth proportional to 750.79, 1,125.67 and 360.77 is: 540.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.79 : 1,125.67 = 360.77 : x
  2. Step 2: Convert to fraction form
    750.79/1,125.67 = 360.77/x
  3. Step 3: Cross multiply
    750.79x = 1,125.67 × 360.77
  4. Step 4: Simplify right side
    750.79x = 406,106.16
  5. Step 5: Solve for x
    x = 406,106.16/750.79
  6. Step 6: Final answer
    x = 540.91

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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.