Home / 1,355.24-2,020.78-1,248.86

Finding the Fourth Proportional to 1,355.24, 2,020.78 and 1,248.86

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Solution

The fourth proportional to 1,355.24, 2,020.78 and 1,248.86 is: 1,862.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.24 : 2,020.78 = 1,248.86 : x
  2. Step 2: Convert to fraction form
    1,355.24/2,020.78 = 1,248.86/x
  3. Step 3: Cross multiply
    1,355.24x = 2,020.78 × 1,248.86
  4. Step 4: Simplify right side
    1,355.24x = 2,523,671.31
  5. Step 5: Solve for x
    x = 2,523,671.31/1,355.24
  6. Step 6: Final answer
    x = 1,862.16

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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.