Home / 2,721.86-4,079.58-1,315.40

Finding the Fourth Proportional to 2,721.86, 4,079.58 and 1,315.40

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Solution

The fourth proportional to 2,721.86, 4,079.58 and 1,315.40 is: 1,971.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.86 : 4,079.58 = 1,315.40 : x
  2. Step 2: Convert to fraction form
    2,721.86/4,079.58 = 1,315.40/x
  3. Step 3: Cross multiply
    2,721.86x = 4,079.58 × 1,315.40
  4. Step 4: Simplify right side
    2,721.86x = 5,366,279.53
  5. Step 5: Solve for x
    x = 5,366,279.53/2,721.86
  6. Step 6: Final answer
    x = 1,971.55

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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.