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Finding the Fourth Proportional to 1,778.99, 2,669.18 and 738.73

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Solution

The fourth proportional to 1,778.99, 2,669.18 and 738.73 is: 1,108.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.99 : 2,669.18 = 738.73 : x
  2. Step 2: Convert to fraction form
    1,778.99/2,669.18 = 738.73/x
  3. Step 3: Cross multiply
    1,778.99x = 2,669.18 × 738.73
  4. Step 4: Simplify right side
    1,778.99x = 1,971,803.34
  5. Step 5: Solve for x
    x = 1,971,803.34/1,778.99
  6. Step 6: Final answer
    x = 1,108.38

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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.