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Finding the Fourth Proportional to 801.68, 1,202.62 and 339.17

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Solution

The fourth proportional to 801.68, 1,202.62 and 339.17 is: 508.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.68 : 1,202.62 = 339.17 : x
  2. Step 2: Convert to fraction form
    801.68/1,202.62 = 339.17/x
  3. Step 3: Cross multiply
    801.68x = 1,202.62 × 339.17
  4. Step 4: Simplify right side
    801.68x = 407,886.61
  5. Step 5: Solve for x
    x = 407,886.61/801.68
  6. Step 6: Final answer
    x = 508.79

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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.