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Finding the Fourth Proportional to 1,227.38, 1,840.80 and 496.40

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Solution

The fourth proportional to 1,227.38, 1,840.80 and 496.40 is: 744.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.38 : 1,840.80 = 496.40 : x
  2. Step 2: Convert to fraction form
    1,227.38/1,840.80 = 496.40/x
  3. Step 3: Cross multiply
    1,227.38x = 1,840.80 × 496.40
  4. Step 4: Simplify right side
    1,227.38x = 913,773.12
  5. Step 5: Solve for x
    x = 913,773.12/1,227.38
  6. Step 6: Final answer
    x = 744.49

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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.