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Finding the Fourth Proportional to 1,391.43, 2,087.23 and 466.91

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Solution

The fourth proportional to 1,391.43, 2,087.23 and 466.91 is: 700.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.43 : 2,087.23 = 466.91 : x
  2. Step 2: Convert to fraction form
    1,391.43/2,087.23 = 466.91/x
  3. Step 3: Cross multiply
    1,391.43x = 2,087.23 × 466.91
  4. Step 4: Simplify right side
    1,391.43x = 974,546.22
  5. Step 5: Solve for x
    x = 974,546.22/1,391.43
  6. Step 6: Final answer
    x = 700.39

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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.