Home / 5,217.19-7,199.67-2,978.91

Finding the Fourth Proportional to 5,217.19, 7,199.67 and 2,978.91

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Solution

The fourth proportional to 5,217.19, 7,199.67 and 2,978.91 is: 4,110.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,217.19 : 7,199.67 = 2,978.91 : x
  2. Step 2: Convert to fraction form
    5,217.19/7,199.67 = 2,978.91/x
  3. Step 3: Cross multiply
    5,217.19x = 7,199.67 × 2,978.91
  4. Step 4: Simplify right side
    5,217.19x = 21,447,168.96
  5. Step 5: Solve for x
    x = 21,447,168.96/5,217.19
  6. Step 6: Final answer
    x = 4,110.87

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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.