Home / 2,217.60-3,326.40-918.72

Finding the Fourth Proportional to 2,217.60, 3,326.40 and 918.72

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Solution

The fourth proportional to 2,217.60, 3,326.40 and 918.72 is: 1,378.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.60 : 3,326.40 = 918.72 : x
  2. Step 2: Convert to fraction form
    2,217.60/3,326.40 = 918.72/x
  3. Step 3: Cross multiply
    2,217.60x = 3,326.40 × 918.72
  4. Step 4: Simplify right side
    2,217.60x = 3,056,030.21
  5. Step 5: Solve for x
    x = 3,056,030.21/2,217.60
  6. Step 6: Final answer
    x = 1,378.08

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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.