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Finding the Fourth Proportional to 750.85, 1,125.94 and 339.97

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Solution

The fourth proportional to 750.85, 1,125.94 and 339.97 is: 509.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.85 : 1,125.94 = 339.97 : x
  2. Step 2: Convert to fraction form
    750.85/1,125.94 = 339.97/x
  3. Step 3: Cross multiply
    750.85x = 1,125.94 × 339.97
  4. Step 4: Simplify right side
    750.85x = 382,778.49
  5. Step 5: Solve for x
    x = 382,778.49/750.85
  6. Step 6: Final answer
    x = 509.80

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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.