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Finding the Fourth Proportional to 1,202.28, 1,803.48 and 380.55

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Solution

The fourth proportional to 1,202.28, 1,803.48 and 380.55 is: 570.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.28 : 1,803.48 = 380.55 : x
  2. Step 2: Convert to fraction form
    1,202.28/1,803.48 = 380.55/x
  3. Step 3: Cross multiply
    1,202.28x = 1,803.48 × 380.55
  4. Step 4: Simplify right side
    1,202.28x = 686,314.31
  5. Step 5: Solve for x
    x = 686,314.31/1,202.28
  6. Step 6: Final answer
    x = 570.84

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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.