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Finding the Fourth Proportional to 5,617.80, 8,431.80 and 2,846.40

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Solution

The fourth proportional to 5,617.80, 8,431.80 and 2,846.40 is: 4,272.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,617.80 : 8,431.80 = 2,846.40 : x
  2. Step 2: Convert to fraction form
    5,617.80/8,431.80 = 2,846.40/x
  3. Step 3: Cross multiply
    5,617.80x = 8,431.80 × 2,846.40
  4. Step 4: Simplify right side
    5,617.80x = 24,000,275.52
  5. Step 5: Solve for x
    x = 24,000,275.52/5,617.80
  6. Step 6: Final answer
    x = 4,272.18

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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.