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Finding the Fourth Proportional to 2,998.77, 4,137.76 and 1,672.19

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Solution

The fourth proportional to 2,998.77, 4,137.76 and 1,672.19 is: 2,307.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,998.77 : 4,137.76 = 1,672.19 : x
  2. Step 2: Convert to fraction form
    2,998.77/4,137.76 = 1,672.19/x
  3. Step 3: Cross multiply
    2,998.77x = 4,137.76 × 1,672.19
  4. Step 4: Simplify right side
    2,998.77x = 6,919,120.89
  5. Step 5: Solve for x
    x = 6,919,120.89/2,998.77
  6. Step 6: Final answer
    x = 2,307.32

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Half scale
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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.