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Finding the Fourth Proportional to 1,201.87, 1,803.21 and 471.05

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Solution

The fourth proportional to 1,201.87, 1,803.21 and 471.05 is: 706.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.87 : 1,803.21 = 471.05 : x
  2. Step 2: Convert to fraction form
    1,201.87/1,803.21 = 471.05/x
  3. Step 3: Cross multiply
    1,201.87x = 1,803.21 × 471.05
  4. Step 4: Simplify right side
    1,201.87x = 849,390.70
  5. Step 5: Solve for x
    x = 849,390.70/1,201.87
  6. Step 6: Final answer
    x = 706.73

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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.