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Finding the Fourth Proportional to 1,346.74, 2,019.63 and 422.02

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Solution

The fourth proportional to 1,346.74, 2,019.63 and 422.02 is: 632.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.74 : 2,019.63 = 422.02 : x
  2. Step 2: Convert to fraction form
    1,346.74/2,019.63 = 422.02/x
  3. Step 3: Cross multiply
    1,346.74x = 2,019.63 × 422.02
  4. Step 4: Simplify right side
    1,346.74x = 852,324.25
  5. Step 5: Solve for x
    x = 852,324.25/1,346.74
  6. Step 6: Final answer
    x = 632.88

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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.