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Finding the Fourth Proportional to 1,046.39, 1,569.31 and 315.88

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Solution

The fourth proportional to 1,046.39, 1,569.31 and 315.88 is: 473.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,046.39 : 1,569.31 = 315.88 : x
  2. Step 2: Convert to fraction form
    1,046.39/1,569.31 = 315.88/x
  3. Step 3: Cross multiply
    1,046.39x = 1,569.31 × 315.88
  4. Step 4: Simplify right side
    1,046.39x = 495,708.93
  5. Step 5: Solve for x
    x = 495,708.93/1,046.39
  6. Step 6: Final answer
    x = 473.73

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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.