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Finding the Fourth Proportional to 758.44, 1,137.66 and 347.47

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Solution

The fourth proportional to 758.44, 1,137.66 and 347.47 is: 521.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.44 : 1,137.66 = 347.47 : x
  2. Step 2: Convert to fraction form
    758.44/1,137.66 = 347.47/x
  3. Step 3: Cross multiply
    758.44x = 1,137.66 × 347.47
  4. Step 4: Simplify right side
    758.44x = 395,302.72
  5. Step 5: Solve for x
    x = 395,302.72/758.44
  6. Step 6: Final answer
    x = 521.21

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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.