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Finding the Fourth Proportional to 1,046.80, 1,570.20 and 994.15

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Solution

The fourth proportional to 1,046.80, 1,570.20 and 994.15 is: 1,491.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,046.80 : 1,570.20 = 994.15 : x
  2. Step 2: Convert to fraction form
    1,046.80/1,570.20 = 994.15/x
  3. Step 3: Cross multiply
    1,046.80x = 1,570.20 × 994.15
  4. Step 4: Simplify right side
    1,046.80x = 1,561,014.33
  5. Step 5: Solve for x
    x = 1,561,014.33/1,046.80
  6. Step 6: Final answer
    x = 1,491.23

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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.