Home / 1,386.10-2,079.15-1,270.90

Finding the Fourth Proportional to 1,386.10, 2,079.15 and 1,270.90

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Solution

The fourth proportional to 1,386.10, 2,079.15 and 1,270.90 is: 1,906.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.10 : 2,079.15 = 1,270.90 : x
  2. Step 2: Convert to fraction form
    1,386.10/2,079.15 = 1,270.90/x
  3. Step 3: Cross multiply
    1,386.10x = 2,079.15 × 1,270.90
  4. Step 4: Simplify right side
    1,386.10x = 2,642,391.74
  5. Step 5: Solve for x
    x = 2,642,391.74/1,386.10
  6. Step 6: Final answer
    x = 1,906.35

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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.