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Finding the Fourth Proportional to 750.99, 1,125.42 and 339.11

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Solution

The fourth proportional to 750.99, 1,125.42 and 339.11 is: 508.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.99 : 1,125.42 = 339.11 : x
  2. Step 2: Convert to fraction form
    750.99/1,125.42 = 339.11/x
  3. Step 3: Cross multiply
    750.99x = 1,125.42 × 339.11
  4. Step 4: Simplify right side
    750.99x = 381,635.55
  5. Step 5: Solve for x
    x = 381,635.55/750.99
  6. Step 6: Final answer
    x = 508.18

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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.