Home / 1,226.08-1,839.24-456.40

Finding the Fourth Proportional to 1,226.08, 1,839.24 and 456.40

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Solution

The fourth proportional to 1,226.08, 1,839.24 and 456.40 is: 684.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.08 : 1,839.24 = 456.40 : x
  2. Step 2: Convert to fraction form
    1,226.08/1,839.24 = 456.40/x
  3. Step 3: Cross multiply
    1,226.08x = 1,839.24 × 456.40
  4. Step 4: Simplify right side
    1,226.08x = 839,429.14
  5. Step 5: Solve for x
    x = 839,429.14/1,226.08
  6. Step 6: Final answer
    x = 684.64

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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.