Home / 1,543.29-2,128.19-1,019.49

Finding the Fourth Proportional to 1,543.29, 2,128.19 and 1,019.49

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Solution

The fourth proportional to 1,543.29, 2,128.19 and 1,019.49 is: 1,405.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.29 : 2,128.19 = 1,019.49 : x
  2. Step 2: Convert to fraction form
    1,543.29/2,128.19 = 1,019.49/x
  3. Step 3: Cross multiply
    1,543.29x = 2,128.19 × 1,019.49
  4. Step 4: Simplify right side
    1,543.29x = 2,169,663.33
  5. Step 5: Solve for x
    x = 2,169,663.33/1,543.29
  6. Step 6: Final answer
    x = 1,405.87

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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.