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Finding the Fourth Proportional to 2,686.39, 4,029.68 and 738.74

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Solution

The fourth proportional to 2,686.39, 4,029.68 and 738.74 is: 1,108.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.39 : 4,029.68 = 738.74 : x
  2. Step 2: Convert to fraction form
    2,686.39/4,029.68 = 738.74/x
  3. Step 3: Cross multiply
    2,686.39x = 4,029.68 × 738.74
  4. Step 4: Simplify right side
    2,686.39x = 2,976,897.72
  5. Step 5: Solve for x
    x = 2,976,897.72/2,686.39
  6. Step 6: Final answer
    x = 1,108.14

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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.