Home / 1,542.47-2,128.93-982.81

Finding the Fourth Proportional to 1,542.47, 2,128.93 and 982.81

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Solution

The fourth proportional to 1,542.47, 2,128.93 and 982.81 is: 1,356.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.47 : 2,128.93 = 982.81 : x
  2. Step 2: Convert to fraction form
    1,542.47/2,128.93 = 982.81/x
  3. Step 3: Cross multiply
    1,542.47x = 2,128.93 × 982.81
  4. Step 4: Simplify right side
    1,542.47x = 2,092,327.45
  5. Step 5: Solve for x
    x = 2,092,327.45/1,542.47
  6. Step 6: Final answer
    x = 1,356.48

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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.