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Finding the Fourth Proportional to 1,014.62, 1,521.18 and 397.79

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Solution

The fourth proportional to 1,014.62, 1,521.18 and 397.79 is: 596.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.62 : 1,521.18 = 397.79 : x
  2. Step 2: Convert to fraction form
    1,014.62/1,521.18 = 397.79/x
  3. Step 3: Cross multiply
    1,014.62x = 1,521.18 × 397.79
  4. Step 4: Simplify right side
    1,014.62x = 605,110.19
  5. Step 5: Solve for x
    x = 605,110.19/1,014.62
  6. Step 6: Final answer
    x = 596.39

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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.