Home / 1,542.79-2,129.28-983.50

Finding the Fourth Proportional to 1,542.79, 2,129.28 and 983.50

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Solution

The fourth proportional to 1,542.79, 2,129.28 and 983.50 is: 1,357.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.79 : 2,129.28 = 983.50 : x
  2. Step 2: Convert to fraction form
    1,542.79/2,129.28 = 983.50/x
  3. Step 3: Cross multiply
    1,542.79x = 2,129.28 × 983.50
  4. Step 4: Simplify right side
    1,542.79x = 2,094,141.96
  5. Step 5: Solve for x
    x = 2,094,141.96/1,542.79
  6. Step 6: Final answer
    x = 1,357.38

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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.