Home / 1,281.39-1,922.30-415.50

Finding the Fourth Proportional to 1,281.39, 1,922.30 and 415.50

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Solution

The fourth proportional to 1,281.39, 1,922.30 and 415.50 is: 623.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.39 : 1,922.30 = 415.50 : x
  2. Step 2: Convert to fraction form
    1,281.39/1,922.30 = 415.50/x
  3. Step 3: Cross multiply
    1,281.39x = 1,922.30 × 415.50
  4. Step 4: Simplify right side
    1,281.39x = 798,713.57
  5. Step 5: Solve for x
    x = 798,713.57/1,281.39
  6. Step 6: Final answer
    x = 623.32

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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.