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Finding the Fourth Proportional to 940.91, 1,401.53 and 898.79

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Solution

The fourth proportional to 940.91, 1,401.53 and 898.79 is: 1,338.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.91 : 1,401.53 = 898.79 : x
  2. Step 2: Convert to fraction form
    940.91/1,401.53 = 898.79/x
  3. Step 3: Cross multiply
    940.91x = 1,401.53 × 898.79
  4. Step 4: Simplify right side
    940.91x = 1,259,669.65
  5. Step 5: Solve for x
    x = 1,259,669.65/940.91
  6. Step 6: Final answer
    x = 1,338.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.