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Finding the Fourth Proportional to 801.86, 1,202.98 and 314.78

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Solution

The fourth proportional to 801.86, 1,202.98 and 314.78 is: 472.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.86 : 1,202.98 = 314.78 : x
  2. Step 2: Convert to fraction form
    801.86/1,202.98 = 314.78/x
  3. Step 3: Cross multiply
    801.86x = 1,202.98 × 314.78
  4. Step 4: Simplify right side
    801.86x = 378,674.04
  5. Step 5: Solve for x
    x = 378,674.04/801.86
  6. Step 6: Final answer
    x = 472.24

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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.