Home / 1,344.60-2,017.22-420.15

Finding the Fourth Proportional to 1,344.60, 2,017.22 and 420.15

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Solution

The fourth proportional to 1,344.60, 2,017.22 and 420.15 is: 630.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.60 : 2,017.22 = 420.15 : x
  2. Step 2: Convert to fraction form
    1,344.60/2,017.22 = 420.15/x
  3. Step 3: Cross multiply
    1,344.60x = 2,017.22 × 420.15
  4. Step 4: Simplify right side
    1,344.60x = 847,532.88
  5. Step 5: Solve for x
    x = 847,532.88/1,344.60
  6. Step 6: Final answer
    x = 630.32

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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.