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Finding the Fourth Proportional to 738.75, 1,107.36 and 276.87

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Solution

The fourth proportional to 738.75, 1,107.36 and 276.87 is: 415.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.75 : 1,107.36 = 276.87 : x
  2. Step 2: Convert to fraction form
    738.75/1,107.36 = 276.87/x
  3. Step 3: Cross multiply
    738.75x = 1,107.36 × 276.87
  4. Step 4: Simplify right side
    738.75x = 306,594.76
  5. Step 5: Solve for x
    x = 306,594.76/738.75
  6. Step 6: Final answer
    x = 415.02

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Double scale
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1.5x scale

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.