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Finding the Fourth Proportional to 1,046.62, 1,569.96 and 397.40

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Solution

The fourth proportional to 1,046.62, 1,569.96 and 397.40 is: 596.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,046.62 : 1,569.96 = 397.40 : x
  2. Step 2: Convert to fraction form
    1,046.62/1,569.96 = 397.40/x
  3. Step 3: Cross multiply
    1,046.62x = 1,569.96 × 397.40
  4. Step 4: Simplify right side
    1,046.62x = 623,902.10
  5. Step 5: Solve for x
    x = 623,902.10/1,046.62
  6. Step 6: Final answer
    x = 596.11

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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.