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Finding the Fourth Proportional to 437.47, 655.19 and 313.75

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Solution

The fourth proportional to 437.47, 655.19 and 313.75 is: 469.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.47 : 655.19 = 313.75 : x
  2. Step 2: Convert to fraction form
    437.47/655.19 = 313.75/x
  3. Step 3: Cross multiply
    437.47x = 655.19 × 313.75
  4. Step 4: Simplify right side
    437.47x = 205,565.86
  5. Step 5: Solve for x
    x = 205,565.86/437.47
  6. Step 6: Final answer
    x = 469.90

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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.