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Finding the Fourth Proportional to 1,046.76, 1,569.69 and 316.20

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Solution

The fourth proportional to 1,046.76, 1,569.69 and 316.20 is: 474.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,046.76 : 1,569.69 = 316.20 : x
  2. Step 2: Convert to fraction form
    1,046.76/1,569.69 = 316.20/x
  3. Step 3: Cross multiply
    1,046.76x = 1,569.69 × 316.20
  4. Step 4: Simplify right side
    1,046.76x = 496,335.98
  5. Step 5: Solve for x
    x = 496,335.98/1,046.76
  6. Step 6: Final answer
    x = 474.16

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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.