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Finding the Fourth Proportional to 780.50, 1,170.46 and 341.73

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Solution

The fourth proportional to 780.50, 1,170.46 and 341.73 is: 512.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.50 : 1,170.46 = 341.73 : x
  2. Step 2: Convert to fraction form
    780.50/1,170.46 = 341.73/x
  3. Step 3: Cross multiply
    780.50x = 1,170.46 × 341.73
  4. Step 4: Simplify right side
    780.50x = 399,981.30
  5. Step 5: Solve for x
    x = 399,981.30/780.50
  6. Step 6: Final answer
    x = 512.47

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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.