Home / 1,542.80-2,129.19-945.29

Finding the Fourth Proportional to 1,542.80, 2,129.19 and 945.29

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Solution

The fourth proportional to 1,542.80, 2,129.19 and 945.29 is: 1,304.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.80 : 2,129.19 = 945.29 : x
  2. Step 2: Convert to fraction form
    1,542.80/2,129.19 = 945.29/x
  3. Step 3: Cross multiply
    1,542.80x = 2,129.19 × 945.29
  4. Step 4: Simplify right side
    1,542.80x = 2,012,707.34
  5. Step 5: Solve for x
    x = 2,012,707.34/1,542.80
  6. Step 6: Final answer
    x = 1,304.58

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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.