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Finding the Fourth Proportional to 1,881.18, 2,819.78 and 905.22

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Solution

The fourth proportional to 1,881.18, 2,819.78 and 905.22 is: 1,356.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.18 : 2,819.78 = 905.22 : x
  2. Step 2: Convert to fraction form
    1,881.18/2,819.78 = 905.22/x
  3. Step 3: Cross multiply
    1,881.18x = 2,819.78 × 905.22
  4. Step 4: Simplify right side
    1,881.18x = 2,552,521.25
  5. Step 5: Solve for x
    x = 2,552,521.25/1,881.18
  6. Step 6: Final answer
    x = 1,356.87

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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.