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Finding the Fourth Proportional to 745.62, 1,118.43 and 437.24

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Solution

The fourth proportional to 745.62, 1,118.43 and 437.24 is: 655.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.62 : 1,118.43 = 437.24 : x
  2. Step 2: Convert to fraction form
    745.62/1,118.43 = 437.24/x
  3. Step 3: Cross multiply
    745.62x = 1,118.43 × 437.24
  4. Step 4: Simplify right side
    745.62x = 489,016.74
  5. Step 5: Solve for x
    x = 489,016.74/745.62
  6. Step 6: Final answer
    x = 655.85

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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.