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Finding the Fourth Proportional to 2,123.08, 3,184.84 and 661.84

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Solution

The fourth proportional to 2,123.08, 3,184.84 and 661.84 is: 992.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.08 : 3,184.84 = 661.84 : x
  2. Step 2: Convert to fraction form
    2,123.08/3,184.84 = 661.84/x
  3. Step 3: Cross multiply
    2,123.08x = 3,184.84 × 661.84
  4. Step 4: Simplify right side
    2,123.08x = 2,107,854.51
  5. Step 5: Solve for x
    x = 2,107,854.51/2,123.08
  6. Step 6: Final answer
    x = 992.83

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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.