Home / 1,543.86-2,131.28-914.56

Finding the Fourth Proportional to 1,543.86, 2,131.28 and 914.56

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Solution

The fourth proportional to 1,543.86, 2,131.28 and 914.56 is: 1,262.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.86 : 2,131.28 = 914.56 : x
  2. Step 2: Convert to fraction form
    1,543.86/2,131.28 = 914.56/x
  3. Step 3: Cross multiply
    1,543.86x = 2,131.28 × 914.56
  4. Step 4: Simplify right side
    1,543.86x = 1,949,176.97
  5. Step 5: Solve for x
    x = 1,949,176.97/1,543.86
  6. Step 6: Final answer
    x = 1,262.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.