Home / 1,390.24-2,087.75-1,234.42

Finding the Fourth Proportional to 1,390.24, 2,087.75 and 1,234.42

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Solution

The fourth proportional to 1,390.24, 2,087.75 and 1,234.42 is: 1,853.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.24 : 2,087.75 = 1,234.42 : x
  2. Step 2: Convert to fraction form
    1,390.24/2,087.75 = 1,234.42/x
  3. Step 3: Cross multiply
    1,390.24x = 2,087.75 × 1,234.42
  4. Step 4: Simplify right side
    1,390.24x = 2,577,143.74
  5. Step 5: Solve for x
    x = 2,577,143.74/1,390.24
  6. Step 6: Final answer
    x = 1,853.74

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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.