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Finding the Fourth Proportional to 6,478.85, 9,718.86 and 1,799.15

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Solution

The fourth proportional to 6,478.85, 9,718.86 and 1,799.15 is: 2,698.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,478.85 : 9,718.86 = 1,799.15 : x
  2. Step 2: Convert to fraction form
    6,478.85/9,718.86 = 1,799.15/x
  3. Step 3: Cross multiply
    6,478.85x = 9,718.86 × 1,799.15
  4. Step 4: Simplify right side
    6,478.85x = 17,485,686.97
  5. Step 5: Solve for x
    x = 17,485,686.97/6,478.85
  6. Step 6: Final answer
    x = 2,698.89

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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.