Home / 2,279.63-3,420.86-981.11

Finding the Fourth Proportional to 2,279.63, 3,420.86 and 981.11

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Solution

The fourth proportional to 2,279.63, 3,420.86 and 981.11 is: 1,472.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.63 : 3,420.86 = 981.11 : x
  2. Step 2: Convert to fraction form
    2,279.63/3,420.86 = 981.11/x
  3. Step 3: Cross multiply
    2,279.63x = 3,420.86 × 981.11
  4. Step 4: Simplify right side
    2,279.63x = 3,356,217.94
  5. Step 5: Solve for x
    x = 3,356,217.94/2,279.63
  6. Step 6: Final answer
    x = 1,472.27

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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.