Home / 1,446.40-2,168.96-420.16

Finding the Fourth Proportional to 1,446.40, 2,168.96 and 420.16

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Solution

The fourth proportional to 1,446.40, 2,168.96 and 420.16 is: 630.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,446.40 : 2,168.96 = 420.16 : x
  2. Step 2: Convert to fraction form
    1,446.40/2,168.96 = 420.16/x
  3. Step 3: Cross multiply
    1,446.40x = 2,168.96 × 420.16
  4. Step 4: Simplify right side
    1,446.40x = 911,310.23
  5. Step 5: Solve for x
    x = 911,310.23/1,446.40
  6. Step 6: Final answer
    x = 630.05

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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.