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Finding the Fourth Proportional to 2,238.48, 3,358.35 and 777.78

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Solution

The fourth proportional to 2,238.48, 3,358.35 and 777.78 is: 1,166.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,238.48 : 3,358.35 = 777.78 : x
  2. Step 2: Convert to fraction form
    2,238.48/3,358.35 = 777.78/x
  3. Step 3: Cross multiply
    2,238.48x = 3,358.35 × 777.78
  4. Step 4: Simplify right side
    2,238.48x = 2,612,057.46
  5. Step 5: Solve for x
    x = 2,612,057.46/2,238.48
  6. Step 6: Final answer
    x = 1,166.89

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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.