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Finding the Fourth Proportional to 2,569.76, 3,855.12 and 838.16

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Solution

The fourth proportional to 2,569.76, 3,855.12 and 838.16 is: 1,257.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,569.76 : 3,855.12 = 838.16 : x
  2. Step 2: Convert to fraction form
    2,569.76/3,855.12 = 838.16/x
  3. Step 3: Cross multiply
    2,569.76x = 3,855.12 × 838.16
  4. Step 4: Simplify right side
    2,569.76x = 3,231,207.38
  5. Step 5: Solve for x
    x = 3,231,207.38/2,569.76
  6. Step 6: Final answer
    x = 1,257.40

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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.