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Finding the Fourth Proportional to 2,998.76, 4,138.28 and 1,672.47

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Solution

The fourth proportional to 2,998.76, 4,138.28 and 1,672.47 is: 2,308.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,998.76 : 4,138.28 = 1,672.47 : x
  2. Step 2: Convert to fraction form
    2,998.76/4,138.28 = 1,672.47/x
  3. Step 3: Cross multiply
    2,998.76x = 4,138.28 × 1,672.47
  4. Step 4: Simplify right side
    2,998.76x = 6,921,142.99
  5. Step 5: Solve for x
    x = 6,921,142.99/2,998.76
  6. Step 6: Final answer
    x = 2,308.00

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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.