Home / 1,228.24-1,842.40-458.72

Finding the Fourth Proportional to 1,228.24, 1,842.40 and 458.72

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Solution

The fourth proportional to 1,228.24, 1,842.40 and 458.72 is: 688.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.24 : 1,842.40 = 458.72 : x
  2. Step 2: Convert to fraction form
    1,228.24/1,842.40 = 458.72/x
  3. Step 3: Cross multiply
    1,228.24x = 1,842.40 × 458.72
  4. Step 4: Simplify right side
    1,228.24x = 845,145.73
  5. Step 5: Solve for x
    x = 845,145.73/1,228.24
  6. Step 6: Final answer
    x = 688.09

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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.