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Finding the Fourth Proportional to 2,549.79, 3,823.53 and 905.90

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Solution

The fourth proportional to 2,549.79, 3,823.53 and 905.90 is: 1,358.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,549.79 : 3,823.53 = 905.90 : x
  2. Step 2: Convert to fraction form
    2,549.79/3,823.53 = 905.90/x
  3. Step 3: Cross multiply
    2,549.79x = 3,823.53 × 905.90
  4. Step 4: Simplify right side
    2,549.79x = 3,463,716.71
  5. Step 5: Solve for x
    x = 3,463,716.71/2,549.79
  6. Step 6: Final answer
    x = 1,358.43

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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.