Home / 3,258.12-4,886.79-918.30

Finding the Fourth Proportional to 3,258.12, 4,886.79 and 918.30

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Solution

The fourth proportional to 3,258.12, 4,886.79 and 918.30 is: 1,377.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,258.12 : 4,886.79 = 918.30 : x
  2. Step 2: Convert to fraction form
    3,258.12/4,886.79 = 918.30/x
  3. Step 3: Cross multiply
    3,258.12x = 4,886.79 × 918.30
  4. Step 4: Simplify right side
    3,258.12x = 4,487,517.49
  5. Step 5: Solve for x
    x = 4,487,517.49/3,258.12
  6. Step 6: Final answer
    x = 1,377.33

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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.