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Finding the Fourth Proportional to 5,972.80, 8,978.40 and 5,627.20

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Solution

The fourth proportional to 5,972.80, 8,978.40 and 5,627.20 is: 8,458.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,972.80 : 8,978.40 = 5,627.20 : x
  2. Step 2: Convert to fraction form
    5,972.80/8,978.40 = 5,627.20/x
  3. Step 3: Cross multiply
    5,972.80x = 8,978.40 × 5,627.20
  4. Step 4: Simplify right side
    5,972.80x = 50,523,252.48
  5. Step 5: Solve for x
    x = 50,523,252.48/5,972.80
  6. Step 6: Final answer
    x = 8,458.89

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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.