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Finding the Fourth Proportional to 5,959.20, 8,938.80 and 4,987.20

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Solution

The fourth proportional to 5,959.20, 8,938.80 and 4,987.20 is: 7,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,959.20 : 8,938.80 = 4,987.20 : x
  2. Step 2: Convert to fraction form
    5,959.20/8,938.80 = 4,987.20/x
  3. Step 3: Cross multiply
    5,959.20x = 8,938.80 × 4,987.20
  4. Step 4: Simplify right side
    5,959.20x = 44,579,583.36
  5. Step 5: Solve for x
    x = 44,579,583.36/5,959.20
  6. Step 6: Final answer
    x = 7,480.80

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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.