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Finding the Fourth Proportional to 3,517.78, 5,271.99 and 1,870.78

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Solution

The fourth proportional to 3,517.78, 5,271.99 and 1,870.78 is: 2,803.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,517.78 : 5,271.99 = 1,870.78 : x
  2. Step 2: Convert to fraction form
    3,517.78/5,271.99 = 1,870.78/x
  3. Step 3: Cross multiply
    3,517.78x = 5,271.99 × 1,870.78
  4. Step 4: Simplify right side
    3,517.78x = 9,862,733.45
  5. Step 5: Solve for x
    x = 9,862,733.45/3,517.78
  6. Step 6: Final answer
    x = 2,803.68

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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.