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Finding the Fourth Proportional to 2,998.61, 4,138.23 and 1,672.28

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Solution

The fourth proportional to 2,998.61, 4,138.23 and 1,672.28 is: 2,307.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,998.61 : 4,138.23 = 1,672.28 : x
  2. Step 2: Convert to fraction form
    2,998.61/4,138.23 = 1,672.28/x
  3. Step 3: Cross multiply
    2,998.61x = 4,138.23 × 1,672.28
  4. Step 4: Simplify right side
    2,998.61x = 6,920,258.57
  5. Step 5: Solve for x
    x = 6,920,258.57/2,998.61
  6. Step 6: Final answer
    x = 2,307.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.