Home / 1,020.29-1,521.60-867.20

Finding the Fourth Proportional to 1,020.29, 1,521.60 and 867.20

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Solution

The fourth proportional to 1,020.29, 1,521.60 and 867.20 is: 1,293.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.29 : 1,521.60 = 867.20 : x
  2. Step 2: Convert to fraction form
    1,020.29/1,521.60 = 867.20/x
  3. Step 3: Cross multiply
    1,020.29x = 1,521.60 × 867.20
  4. Step 4: Simplify right side
    1,020.29x = 1,319,523.91
  5. Step 5: Solve for x
    x = 1,319,523.91/1,020.29
  6. Step 6: Final answer
    x = 1,293.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.