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Finding the Fourth Proportional to 1,089.46, 1,632.84 and 395.56

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Solution

The fourth proportional to 1,089.46, 1,632.84 and 395.56 is: 592.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.46 : 1,632.84 = 395.56 : x
  2. Step 2: Convert to fraction form
    1,089.46/1,632.84 = 395.56/x
  3. Step 3: Cross multiply
    1,089.46x = 1,632.84 × 395.56
  4. Step 4: Simplify right side
    1,089.46x = 645,886.19
  5. Step 5: Solve for x
    x = 645,886.19/1,089.46
  6. Step 6: Final answer
    x = 592.85

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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.