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Finding the Fourth Proportional to 3,639.19, 5,458.78 and 903.19

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Solution

The fourth proportional to 3,639.19, 5,458.78 and 903.19 is: 1,354.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.19 : 5,458.78 = 903.19 : x
  2. Step 2: Convert to fraction form
    3,639.19/5,458.78 = 903.19/x
  3. Step 3: Cross multiply
    3,639.19x = 5,458.78 × 903.19
  4. Step 4: Simplify right side
    3,639.19x = 4,930,302.99
  5. Step 5: Solve for x
    x = 4,930,302.99/3,639.19
  6. Step 6: Final answer
    x = 1,354.78

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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.