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Finding the Fourth Proportional to 801.33, 1,202.14 and 390.66

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Solution

The fourth proportional to 801.33, 1,202.14 and 390.66 is: 586.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.33 : 1,202.14 = 390.66 : x
  2. Step 2: Convert to fraction form
    801.33/1,202.14 = 390.66/x
  3. Step 3: Cross multiply
    801.33x = 1,202.14 × 390.66
  4. Step 4: Simplify right side
    801.33x = 469,623.99
  5. Step 5: Solve for x
    x = 469,623.99/801.33
  6. Step 6: Final answer
    x = 586.06

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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.