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Finding the Fourth Proportional to 1,767.05, 2,438.49 and 981.08

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Solution

The fourth proportional to 1,767.05, 2,438.49 and 981.08 is: 1,353.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,767.05 : 2,438.49 = 981.08 : x
  2. Step 2: Convert to fraction form
    1,767.05/2,438.49 = 981.08/x
  3. Step 3: Cross multiply
    1,767.05x = 2,438.49 × 981.08
  4. Step 4: Simplify right side
    1,767.05x = 2,392,353.77
  5. Step 5: Solve for x
    x = 2,392,353.77/1,767.05
  6. Step 6: Final answer
    x = 1,353.87

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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.