Home / 1,089.40-1,632.05-539.92

Finding the Fourth Proportional to 1,089.40, 1,632.05 and 539.92

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Solution

The fourth proportional to 1,089.40, 1,632.05 and 539.92 is: 808.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.40 : 1,632.05 = 539.92 : x
  2. Step 2: Convert to fraction form
    1,089.40/1,632.05 = 539.92/x
  3. Step 3: Cross multiply
    1,089.40x = 1,632.05 × 539.92
  4. Step 4: Simplify right side
    1,089.40x = 881,168.62
  5. Step 5: Solve for x
    x = 881,168.62/1,089.40
  6. Step 6: Final answer
    x = 808.86

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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.