Home / 2,139.24-3,208.02-840.52

Finding the Fourth Proportional to 2,139.24, 3,208.02 and 840.52

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Solution

The fourth proportional to 2,139.24, 3,208.02 and 840.52 is: 1,260.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.24 : 3,208.02 = 840.52 : x
  2. Step 2: Convert to fraction form
    2,139.24/3,208.02 = 840.52/x
  3. Step 3: Cross multiply
    2,139.24x = 3,208.02 × 840.52
  4. Step 4: Simplify right side
    2,139.24x = 2,696,404.97
  5. Step 5: Solve for x
    x = 2,696,404.97/2,139.24
  6. Step 6: Final answer
    x = 1,260.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.