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Finding the Fourth Proportional to 1,197.46, 1,795.92 and 780.85

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Solution

The fourth proportional to 1,197.46, 1,795.92 and 780.85 is: 1,171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,197.46 : 1,795.92 = 780.85 : x
  2. Step 2: Convert to fraction form
    1,197.46/1,795.92 = 780.85/x
  3. Step 3: Cross multiply
    1,197.46x = 1,795.92 × 780.85
  4. Step 4: Simplify right side
    1,197.46x = 1,402,344.13
  5. Step 5: Solve for x
    x = 1,402,344.13/1,197.46
  6. Step 6: Final answer
    x = 1,171.10

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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.