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Finding the Fourth Proportional to 1,671.60, 2,507.28 and 517.44

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Solution

The fourth proportional to 1,671.60, 2,507.28 and 517.44 is: 776.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,671.60 : 2,507.28 = 517.44 : x
  2. Step 2: Convert to fraction form
    1,671.60/2,507.28 = 517.44/x
  3. Step 3: Cross multiply
    1,671.60x = 2,507.28 × 517.44
  4. Step 4: Simplify right side
    1,671.60x = 1,297,366.96
  5. Step 5: Solve for x
    x = 1,297,366.96/1,671.60
  6. Step 6: Final answer
    x = 776.12

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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.