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Finding the Fourth Proportional to 738.99, 1,108.90 and 277.09

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Solution

The fourth proportional to 738.99, 1,108.90 and 277.09 is: 415.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.99 : 1,108.90 = 277.09 : x
  2. Step 2: Convert to fraction form
    738.99/1,108.90 = 277.09/x
  3. Step 3: Cross multiply
    738.99x = 1,108.90 × 277.09
  4. Step 4: Simplify right side
    738.99x = 307,265.10
  5. Step 5: Solve for x
    x = 307,265.10/738.99
  6. Step 6: Final answer
    x = 415.79

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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.