Home / 2,209.92-3,312.60-977.91

Finding the Fourth Proportional to 2,209.92, 3,312.60 and 977.91

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Solution

The fourth proportional to 2,209.92, 3,312.60 and 977.91 is: 1,465.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.92 : 3,312.60 = 977.91 : x
  2. Step 2: Convert to fraction form
    2,209.92/3,312.60 = 977.91/x
  3. Step 3: Cross multiply
    2,209.92x = 3,312.60 × 977.91
  4. Step 4: Simplify right side
    2,209.92x = 3,239,408.58
  5. Step 5: Solve for x
    x = 3,239,408.58/2,209.92
  6. Step 6: Final answer
    x = 1,465.85

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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.