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Finding the Fourth Proportional to 1,391.79, 2,087.82 and 467.36

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Solution

The fourth proportional to 1,391.79, 2,087.82 and 467.36 is: 701.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.79 : 2,087.82 = 467.36 : x
  2. Step 2: Convert to fraction form
    1,391.79/2,087.82 = 467.36/x
  3. Step 3: Cross multiply
    1,391.79x = 2,087.82 × 467.36
  4. Step 4: Simplify right side
    1,391.79x = 975,753.12
  5. Step 5: Solve for x
    x = 975,753.12/1,391.79
  6. Step 6: Final answer
    x = 701.08

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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.