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Finding the Fourth Proportional to 758.43, 1,137.55 and 347.45

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Solution

The fourth proportional to 758.43, 1,137.55 and 347.45 is: 521.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.43 : 1,137.55 = 347.45 : x
  2. Step 2: Convert to fraction form
    758.43/1,137.55 = 347.45/x
  3. Step 3: Cross multiply
    758.43x = 1,137.55 × 347.45
  4. Step 4: Simplify right side
    758.43x = 395,241.75
  5. Step 5: Solve for x
    x = 395,241.75/758.43
  6. Step 6: Final answer
    x = 521.13

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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.