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Finding the Fourth Proportional to 1,244.77, 1,866.39 and 422.98

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Solution

The fourth proportional to 1,244.77, 1,866.39 and 422.98 is: 634.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.77 : 1,866.39 = 422.98 : x
  2. Step 2: Convert to fraction form
    1,244.77/1,866.39 = 422.98/x
  3. Step 3: Cross multiply
    1,244.77x = 1,866.39 × 422.98
  4. Step 4: Simplify right side
    1,244.77x = 789,445.64
  5. Step 5: Solve for x
    x = 789,445.64/1,244.77
  6. Step 6: Final answer
    x = 634.21

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1.5x scale

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.