Home / 1,315.76-1,971.44-1,267.31

Finding the Fourth Proportional to 1,315.76, 1,971.44 and 1,267.31

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Solution

The fourth proportional to 1,315.76, 1,971.44 and 1,267.31 is: 1,898.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.76 : 1,971.44 = 1,267.31 : x
  2. Step 2: Convert to fraction form
    1,315.76/1,971.44 = 1,267.31/x
  3. Step 3: Cross multiply
    1,315.76x = 1,971.44 × 1,267.31
  4. Step 4: Simplify right side
    1,315.76x = 2,498,428.97
  5. Step 5: Solve for x
    x = 2,498,428.97/1,315.76
  6. Step 6: Final answer
    x = 1,898.85

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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.