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Finding the Fourth Proportional to 3,857.61, 5,328.95 and 3,070.65

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Solution

The fourth proportional to 3,857.61, 5,328.95 and 3,070.65 is: 4,241.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.61 : 5,328.95 = 3,070.65 : x
  2. Step 2: Convert to fraction form
    3,857.61/5,328.95 = 3,070.65/x
  3. Step 3: Cross multiply
    3,857.61x = 5,328.95 × 3,070.65
  4. Step 4: Simplify right side
    3,857.61x = 16,363,324.96
  5. Step 5: Solve for x
    x = 16,363,324.96/3,857.61
  6. Step 6: Final answer
    x = 4,241.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.