Home / 1,008.21-1,391.40-560.15

Finding the Fourth Proportional to 1,008.21, 1,391.40 and 560.15

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Solution

The fourth proportional to 1,008.21, 1,391.40 and 560.15 is: 773.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.21 : 1,391.40 = 560.15 : x
  2. Step 2: Convert to fraction form
    1,008.21/1,391.40 = 560.15/x
  3. Step 3: Cross multiply
    1,008.21x = 1,391.40 × 560.15
  4. Step 4: Simplify right side
    1,008.21x = 779,383.65
  5. Step 5: Solve for x
    x = 779,383.65/1,008.21
  6. Step 6: Final answer
    x = 773.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.