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Finding the Fourth Proportional to 745.48, 1,118.28 and 306.63

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Solution

The fourth proportional to 745.48, 1,118.28 and 306.63 is: 459.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.48 : 1,118.28 = 306.63 : x
  2. Step 2: Convert to fraction form
    745.48/1,118.28 = 306.63/x
  3. Step 3: Cross multiply
    745.48x = 1,118.28 × 306.63
  4. Step 4: Simplify right side
    745.48x = 342,892.61
  5. Step 5: Solve for x
    x = 342,892.61/745.48
  6. Step 6: Final answer
    x = 459.97

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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.