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Finding the Fourth Proportional to 1,384.01, 1,906.70 and 1,133.87

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Solution

The fourth proportional to 1,384.01, 1,906.70 and 1,133.87 is: 1,562.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.01 : 1,906.70 = 1,133.87 : x
  2. Step 2: Convert to fraction form
    1,384.01/1,906.70 = 1,133.87/x
  3. Step 3: Cross multiply
    1,384.01x = 1,906.70 × 1,133.87
  4. Step 4: Simplify right side
    1,384.01x = 2,161,934.73
  5. Step 5: Solve for x
    x = 2,161,934.73/1,384.01
  6. Step 6: Final answer
    x = 1,562.09

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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.