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Finding the Fourth Proportional to 2,549.19, 3,823.77 and 905.79

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Solution

The fourth proportional to 2,549.19, 3,823.77 and 905.79 is: 1,358.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,549.19 : 3,823.77 = 905.79 : x
  2. Step 2: Convert to fraction form
    2,549.19/3,823.77 = 905.79/x
  3. Step 3: Cross multiply
    2,549.19x = 3,823.77 × 905.79
  4. Step 4: Simplify right side
    2,549.19x = 3,463,532.63
  5. Step 5: Solve for x
    x = 3,463,532.63/2,549.19
  6. Step 6: Final answer
    x = 1,358.68

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Double scale
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Similar ratio
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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.