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Finding the Fourth Proportional to 751.48, 1,124.79 and 442.56

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Solution

The fourth proportional to 751.48, 1,124.79 and 442.56 is: 662.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.48 : 1,124.79 = 442.56 : x
  2. Step 2: Convert to fraction form
    751.48/1,124.79 = 442.56/x
  3. Step 3: Cross multiply
    751.48x = 1,124.79 × 442.56
  4. Step 4: Simplify right side
    751.48x = 497,789.62
  5. Step 5: Solve for x
    x = 497,789.62/751.48
  6. Step 6: Final answer
    x = 662.41

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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.