Home / 1,344.47-2,016.65-420.11

Finding the Fourth Proportional to 1,344.47, 2,016.65 and 420.11

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Solution

The fourth proportional to 1,344.47, 2,016.65 and 420.11 is: 630.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.47 : 2,016.65 = 420.11 : x
  2. Step 2: Convert to fraction form
    1,344.47/2,016.65 = 420.11/x
  3. Step 3: Cross multiply
    1,344.47x = 2,016.65 × 420.11
  4. Step 4: Simplify right side
    1,344.47x = 847,202.65
  5. Step 5: Solve for x
    x = 847,202.65/1,344.47
  6. Step 6: Final answer
    x = 630.14

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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.