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Finding the Fourth Proportional to 5,478.88, 8,218.32 and 4,655.20

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Solution

The fourth proportional to 5,478.88, 8,218.32 and 4,655.20 is: 6,982.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.88 : 8,218.32 = 4,655.20 : x
  2. Step 2: Convert to fraction form
    5,478.88/8,218.32 = 4,655.20/x
  3. Step 3: Cross multiply
    5,478.88x = 8,218.32 × 4,655.20
  4. Step 4: Simplify right side
    5,478.88x = 38,257,923.26
  5. Step 5: Solve for x
    x = 38,257,923.26/5,478.88
  6. Step 6: Final answer
    x = 6,982.80

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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.