Home / 5,479.32-8,219.80-1,780.32

Finding the Fourth Proportional to 5,479.32, 8,219.80 and 1,780.32

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Solution

The fourth proportional to 5,479.32, 8,219.80 and 1,780.32 is: 2,670.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.32 : 8,219.80 = 1,780.32 : x
  2. Step 2: Convert to fraction form
    5,479.32/8,219.80 = 1,780.32/x
  3. Step 3: Cross multiply
    5,479.32x = 8,219.80 × 1,780.32
  4. Step 4: Simplify right side
    5,479.32x = 14,633,874.34
  5. Step 5: Solve for x
    x = 14,633,874.34/5,479.32
  6. Step 6: Final answer
    x = 2,670.75

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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.