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Finding the Fourth Proportional to 3,980.98, 5,970.51 and 1,515.70

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Solution

The fourth proportional to 3,980.98, 5,970.51 and 1,515.70 is: 2,273.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.98 : 5,970.51 = 1,515.70 : x
  2. Step 2: Convert to fraction form
    3,980.98/5,970.51 = 1,515.70/x
  3. Step 3: Cross multiply
    3,980.98x = 5,970.51 × 1,515.70
  4. Step 4: Simplify right side
    3,980.98x = 9,049,502.01
  5. Step 5: Solve for x
    x = 9,049,502.01/3,980.98
  6. Step 6: Final answer
    x = 2,273.18

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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.