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Finding the Fourth Proportional to 744.98, 1,115.94 and 349.08

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Solution

The fourth proportional to 744.98, 1,115.94 and 349.08 is: 522.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.98 : 1,115.94 = 349.08 : x
  2. Step 2: Convert to fraction form
    744.98/1,115.94 = 349.08/x
  3. Step 3: Cross multiply
    744.98x = 1,115.94 × 349.08
  4. Step 4: Simplify right side
    744.98x = 389,552.34
  5. Step 5: Solve for x
    x = 389,552.34/744.98
  6. Step 6: Final answer
    x = 522.90

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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.