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Finding the Fourth Proportional to 1,088.52, 1,632.79 and 395.21

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Solution

The fourth proportional to 1,088.52, 1,632.79 and 395.21 is: 592.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.52 : 1,632.79 = 395.21 : x
  2. Step 2: Convert to fraction form
    1,088.52/1,632.79 = 395.21/x
  3. Step 3: Cross multiply
    1,088.52x = 1,632.79 × 395.21
  4. Step 4: Simplify right side
    1,088.52x = 645,299.51
  5. Step 5: Solve for x
    x = 645,299.51/1,088.52
  6. Step 6: Final answer
    x = 592.82

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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.