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Finding the Fourth Proportional to 3,423.48, 5,135.06 and 1,115

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Solution

The fourth proportional to 3,423.48, 5,135.06 and 1,115 is: 1,672.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,423.48 : 5,135.06 = 1,115 : x
  2. Step 2: Convert to fraction form
    3,423.48/5,135.06 = 1,115/x
  3. Step 3: Cross multiply
    3,423.48x = 5,135.06 × 1,115
  4. Step 4: Simplify right side
    3,423.48x = 5,725,591.90
  5. Step 5: Solve for x
    x = 5,725,591.90/3,423.48
  6. Step 6: Final answer
    x = 1,672.45

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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.