Home / 2,420.91-3,630.98-1,187.99

Finding the Fourth Proportional to 2,420.91, 3,630.98 and 1,187.99

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Solution

The fourth proportional to 2,420.91, 3,630.98 and 1,187.99 is: 1,781.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.91 : 3,630.98 = 1,187.99 : x
  2. Step 2: Convert to fraction form
    2,420.91/3,630.98 = 1,187.99/x
  3. Step 3: Cross multiply
    2,420.91x = 3,630.98 × 1,187.99
  4. Step 4: Simplify right side
    2,420.91x = 4,313,569.89
  5. Step 5: Solve for x
    x = 4,313,569.89/2,420.91
  6. Step 6: Final answer
    x = 1,781.79

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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.