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Finding the Fourth Proportional to 3,607.65, 5,411.48 and 3,121.65

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Solution

The fourth proportional to 3,607.65, 5,411.48 and 3,121.65 is: 4,682.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,607.65 : 5,411.48 = 3,121.65 : x
  2. Step 2: Convert to fraction form
    3,607.65/5,411.48 = 3,121.65/x
  3. Step 3: Cross multiply
    3,607.65x = 5,411.48 × 3,121.65
  4. Step 4: Simplify right side
    3,607.65x = 16,892,730.93
  5. Step 5: Solve for x
    x = 16,892,730.93/3,607.65
  6. Step 6: Final answer
    x = 4,682.48

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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.