Home / 1,542.15-2,128.34-983.13

Finding the Fourth Proportional to 1,542.15, 2,128.34 and 983.13

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Solution

The fourth proportional to 1,542.15, 2,128.34 and 983.13 is: 1,356.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.15 : 2,128.34 = 983.13 : x
  2. Step 2: Convert to fraction form
    1,542.15/2,128.34 = 983.13/x
  3. Step 3: Cross multiply
    1,542.15x = 2,128.34 × 983.13
  4. Step 4: Simplify right side
    1,542.15x = 2,092,429.99
  5. Step 5: Solve for x
    x = 2,092,429.99/1,542.15
  6. Step 6: Final answer
    x = 1,356.83

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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.