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Finding the Fourth Proportional to 759.40, 1,137.50 and 348.88

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Solution

The fourth proportional to 759.40, 1,137.50 and 348.88 is: 522.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.40 : 1,137.50 = 348.88 : x
  2. Step 2: Convert to fraction form
    759.40/1,137.50 = 348.88/x
  3. Step 3: Cross multiply
    759.40x = 1,137.50 × 348.88
  4. Step 4: Simplify right side
    759.40x = 396,854.03
  5. Step 5: Solve for x
    x = 396,854.03/759.40
  6. Step 6: Final answer
    x = 522.59

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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.