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Finding the Fourth Proportional to 2,123.69, 3,183.66 and 807.20

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Solution

The fourth proportional to 2,123.69, 3,183.66 and 807.20 is: 1,210.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.69 : 3,183.66 = 807.20 : x
  2. Step 2: Convert to fraction form
    2,123.69/3,183.66 = 807.20/x
  3. Step 3: Cross multiply
    2,123.69x = 3,183.66 × 807.20
  4. Step 4: Simplify right side
    2,123.69x = 2,569,850.35
  5. Step 5: Solve for x
    x = 2,569,850.35/2,123.69
  6. Step 6: Final answer
    x = 1,210.09

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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.