Home / 1,317.28-1,985.92-1,246.72

Finding the Fourth Proportional to 1,317.28, 1,985.92 and 1,246.72

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Solution

The fourth proportional to 1,317.28, 1,985.92 and 1,246.72 is: 1,879.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.28 : 1,985.92 = 1,246.72 : x
  2. Step 2: Convert to fraction form
    1,317.28/1,985.92 = 1,246.72/x
  3. Step 3: Cross multiply
    1,317.28x = 1,985.92 × 1,246.72
  4. Step 4: Simplify right side
    1,317.28x = 2,475,886.18
  5. Step 5: Solve for x
    x = 2,475,886.18/1,317.28
  6. Step 6: Final answer
    x = 1,879.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.