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Finding the Fourth Proportional to 738.89, 1,108.77 and 276.99

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Solution

The fourth proportional to 738.89, 1,108.77 and 276.99 is: 415.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.89 : 1,108.77 = 276.99 : x
  2. Step 2: Convert to fraction form
    738.89/1,108.77 = 276.99/x
  3. Step 3: Cross multiply
    738.89x = 1,108.77 × 276.99
  4. Step 4: Simplify right side
    738.89x = 307,118.20
  5. Step 5: Solve for x
    x = 307,118.20/738.89
  6. Step 6: Final answer
    x = 415.65

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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.