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Finding the Fourth Proportional to 750.86, 1,124.07 and 425.24

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Solution

The fourth proportional to 750.86, 1,124.07 and 425.24 is: 636.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.86 : 1,124.07 = 425.24 : x
  2. Step 2: Convert to fraction form
    750.86/1,124.07 = 425.24/x
  3. Step 3: Cross multiply
    750.86x = 1,124.07 × 425.24
  4. Step 4: Simplify right side
    750.86x = 477,999.53
  5. Step 5: Solve for x
    x = 477,999.53/750.86
  6. Step 6: Final answer
    x = 636.60

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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.