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Finding the Fourth Proportional to 1,355.87, 2,033.80 and 381.84

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Solution

The fourth proportional to 1,355.87, 2,033.80 and 381.84 is: 572.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.87 : 2,033.80 = 381.84 : x
  2. Step 2: Convert to fraction form
    1,355.87/2,033.80 = 381.84/x
  3. Step 3: Cross multiply
    1,355.87x = 2,033.80 × 381.84
  4. Step 4: Simplify right side
    1,355.87x = 776,585.24
  5. Step 5: Solve for x
    x = 776,585.24/1,355.87
  6. Step 6: Final answer
    x = 572.76

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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.