Home / 2,217.39-3,319.65-1,290.12

Finding the Fourth Proportional to 2,217.39, 3,319.65 and 1,290.12

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Solution

The fourth proportional to 2,217.39, 3,319.65 and 1,290.12 is: 1,931.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.39 : 3,319.65 = 1,290.12 : x
  2. Step 2: Convert to fraction form
    2,217.39/3,319.65 = 1,290.12/x
  3. Step 3: Cross multiply
    2,217.39x = 3,319.65 × 1,290.12
  4. Step 4: Simplify right side
    2,217.39x = 4,282,746.86
  5. Step 5: Solve for x
    x = 4,282,746.86/2,217.39
  6. Step 6: Final answer
    x = 1,931.44

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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.