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Finding the Fourth Proportional to 1,087.99, 1,632.84 and 394.85

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Solution

The fourth proportional to 1,087.99, 1,632.84 and 394.85 is: 592.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.99 : 1,632.84 = 394.85 : x
  2. Step 2: Convert to fraction form
    1,087.99/1,632.84 = 394.85/x
  3. Step 3: Cross multiply
    1,087.99x = 1,632.84 × 394.85
  4. Step 4: Simplify right side
    1,087.99x = 644,726.87
  5. Step 5: Solve for x
    x = 644,726.87/1,087.99
  6. Step 6: Final answer
    x = 592.59

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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.