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Finding the Fourth Proportional to 1,170.62, 1,756.20 and 348.87

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Solution

The fourth proportional to 1,170.62, 1,756.20 and 348.87 is: 523.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.62 : 1,756.20 = 348.87 : x
  2. Step 2: Convert to fraction form
    1,170.62/1,756.20 = 348.87/x
  3. Step 3: Cross multiply
    1,170.62x = 1,756.20 × 348.87
  4. Step 4: Simplify right side
    1,170.62x = 612,685.49
  5. Step 5: Solve for x
    x = 612,685.49/1,170.62
  6. Step 6: Final answer
    x = 523.39

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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.