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Finding the Fourth Proportional to 738.89, 1,108.88 and 276.78

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Solution

The fourth proportional to 738.89, 1,108.88 and 276.78 is: 415.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.89 : 1,108.88 = 276.78 : x
  2. Step 2: Convert to fraction form
    738.89/1,108.88 = 276.78/x
  3. Step 3: Cross multiply
    738.89x = 1,108.88 × 276.78
  4. Step 4: Simplify right side
    738.89x = 306,915.81
  5. Step 5: Solve for x
    x = 306,915.81/738.89
  6. Step 6: Final answer
    x = 415.38

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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.