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Finding the Fourth Proportional to 1,074.70, 1,612.12 and 344.80

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Solution

The fourth proportional to 1,074.70, 1,612.12 and 344.80 is: 517.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.70 : 1,612.12 = 344.80 : x
  2. Step 2: Convert to fraction form
    1,074.70/1,612.12 = 344.80/x
  3. Step 3: Cross multiply
    1,074.70x = 1,612.12 × 344.80
  4. Step 4: Simplify right side
    1,074.70x = 555,858.98
  5. Step 5: Solve for x
    x = 555,858.98/1,074.70
  6. Step 6: Final answer
    x = 517.22

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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.