Home / 2,217.15-3,319.27-1,289.88

Finding the Fourth Proportional to 2,217.15, 3,319.27 and 1,289.88

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Solution

The fourth proportional to 2,217.15, 3,319.27 and 1,289.88 is: 1,931.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.15 : 3,319.27 = 1,289.88 : x
  2. Step 2: Convert to fraction form
    2,217.15/3,319.27 = 1,289.88/x
  3. Step 3: Cross multiply
    2,217.15x = 3,319.27 × 1,289.88
  4. Step 4: Simplify right side
    2,217.15x = 4,281,459.99
  5. Step 5: Solve for x
    x = 4,281,459.99/2,217.15
  6. Step 6: Final answer
    x = 1,931.06

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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.