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Finding the Fourth Proportional to 759.57, 1,139.25 and 297.67

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Solution

The fourth proportional to 759.57, 1,139.25 and 297.67 is: 446.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.57 : 1,139.25 = 297.67 : x
  2. Step 2: Convert to fraction form
    759.57/1,139.25 = 297.67/x
  3. Step 3: Cross multiply
    759.57x = 1,139.25 × 297.67
  4. Step 4: Simplify right side
    759.57x = 339,119.28
  5. Step 5: Solve for x
    x = 339,119.28/759.57
  6. Step 6: Final answer
    x = 446.46

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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.