Home / 2,208.10-3,312.96-909.68

Finding the Fourth Proportional to 2,208.10, 3,312.96 and 909.68

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Solution

The fourth proportional to 2,208.10, 3,312.96 and 909.68 is: 1,364.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.10 : 3,312.96 = 909.68 : x
  2. Step 2: Convert to fraction form
    2,208.10/3,312.96 = 909.68/x
  3. Step 3: Cross multiply
    2,208.10x = 3,312.96 × 909.68
  4. Step 4: Simplify right side
    2,208.10x = 3,013,733.45
  5. Step 5: Solve for x
    x = 3,013,733.45/2,208.10
  6. Step 6: Final answer
    x = 1,364.85

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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.