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Finding the Fourth Proportional to 5,156.62, 7,731.16 and 1,644.62

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Solution

The fourth proportional to 5,156.62, 7,731.16 and 1,644.62 is: 2,465.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.62 : 7,731.16 = 1,644.62 : x
  2. Step 2: Convert to fraction form
    5,156.62/7,731.16 = 1,644.62/x
  3. Step 3: Cross multiply
    5,156.62x = 7,731.16 × 1,644.62
  4. Step 4: Simplify right side
    5,156.62x = 12,714,777.59
  5. Step 5: Solve for x
    x = 12,714,777.59/5,156.62
  6. Step 6: Final answer
    x = 2,465.72

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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.