Home / 1,543.31-2,129.42-913.87

Finding the Fourth Proportional to 1,543.31, 2,129.42 and 913.87

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Solution

The fourth proportional to 1,543.31, 2,129.42 and 913.87 is: 1,260.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.31 : 2,129.42 = 913.87 : x
  2. Step 2: Convert to fraction form
    1,543.31/2,129.42 = 913.87/x
  3. Step 3: Cross multiply
    1,543.31x = 2,129.42 × 913.87
  4. Step 4: Simplify right side
    1,543.31x = 1,946,013.06
  5. Step 5: Solve for x
    x = 1,946,013.06/1,543.31
  6. Step 6: Final answer
    x = 1,260.93

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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.