Home / 2,187.13-3,280.70-648.13

Finding the Fourth Proportional to 2,187.13, 3,280.70 and 648.13

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Solution

The fourth proportional to 2,187.13, 3,280.70 and 648.13 is: 972.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.13 : 3,280.70 = 648.13 : x
  2. Step 2: Convert to fraction form
    2,187.13/3,280.70 = 648.13/x
  3. Step 3: Cross multiply
    2,187.13x = 3,280.70 × 648.13
  4. Step 4: Simplify right side
    2,187.13x = 2,126,320.09
  5. Step 5: Solve for x
    x = 2,126,320.09/2,187.13
  6. Step 6: Final answer
    x = 972.20

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1.5x scale

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.