Home / 4,458.72-6,689.18-1,338.78

Finding the Fourth Proportional to 4,458.72, 6,689.18 and 1,338.78

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Solution

The fourth proportional to 4,458.72, 6,689.18 and 1,338.78 is: 2,008.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,458.72 : 6,689.18 = 1,338.78 : x
  2. Step 2: Convert to fraction form
    4,458.72/6,689.18 = 1,338.78/x
  3. Step 3: Cross multiply
    4,458.72x = 6,689.18 × 1,338.78
  4. Step 4: Simplify right side
    4,458.72x = 8,955,343.75
  5. Step 5: Solve for x
    x = 8,955,343.75/4,458.72
  6. Step 6: Final answer
    x = 2,008.50

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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.