Home / 5,479.11-8,219.61-1,780.29

Finding the Fourth Proportional to 5,479.11, 8,219.61 and 1,780.29

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Solution

The fourth proportional to 5,479.11, 8,219.61 and 1,780.29 is: 2,670.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.11 : 8,219.61 = 1,780.29 : x
  2. Step 2: Convert to fraction form
    5,479.11/8,219.61 = 1,780.29/x
  3. Step 3: Cross multiply
    5,479.11x = 8,219.61 × 1,780.29
  4. Step 4: Simplify right side
    5,479.11x = 14,633,289.49
  5. Step 5: Solve for x
    x = 14,633,289.49/5,479.11
  6. Step 6: Final answer
    x = 2,670.74

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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.