Home / 1,543.19-2,129.27-913.73

Finding the Fourth Proportional to 1,543.19, 2,129.27 and 913.73

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Solution

The fourth proportional to 1,543.19, 2,129.27 and 913.73 is: 1,260.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.19 : 2,129.27 = 913.73 : x
  2. Step 2: Convert to fraction form
    1,543.19/2,129.27 = 913.73/x
  3. Step 3: Cross multiply
    1,543.19x = 2,129.27 × 913.73
  4. Step 4: Simplify right side
    1,543.19x = 1,945,562.66
  5. Step 5: Solve for x
    x = 1,945,562.66/1,543.19
  6. Step 6: Final answer
    x = 1,260.74

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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.