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Finding the Fourth Proportional to 2,623.15, 3,934.73 and 891.79

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Solution

The fourth proportional to 2,623.15, 3,934.73 and 891.79 is: 1,337.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,623.15 : 3,934.73 = 891.79 : x
  2. Step 2: Convert to fraction form
    2,623.15/3,934.73 = 891.79/x
  3. Step 3: Cross multiply
    2,623.15x = 3,934.73 × 891.79
  4. Step 4: Simplify right side
    2,623.15x = 3,508,952.87
  5. Step 5: Solve for x
    x = 3,508,952.87/2,623.15
  6. Step 6: Final answer
    x = 1,337.69

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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.