Home / 1,346.85-2,020.59-422.40

Finding the Fourth Proportional to 1,346.85, 2,020.59 and 422.40

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Solution

The fourth proportional to 1,346.85, 2,020.59 and 422.40 is: 633.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.85 : 2,020.59 = 422.40 : x
  2. Step 2: Convert to fraction form
    1,346.85/2,020.59 = 422.40/x
  3. Step 3: Cross multiply
    1,346.85x = 2,020.59 × 422.40
  4. Step 4: Simplify right side
    1,346.85x = 853,497.22
  5. Step 5: Solve for x
    x = 853,497.22/1,346.85
  6. Step 6: Final answer
    x = 633.70

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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.