Home / 1,089.20-1,632.58-471.98

Finding the Fourth Proportional to 1,089.20, 1,632.58 and 471.98

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Solution

The fourth proportional to 1,089.20, 1,632.58 and 471.98 is: 707.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.20 : 1,632.58 = 471.98 : x
  2. Step 2: Convert to fraction form
    1,089.20/1,632.58 = 471.98/x
  3. Step 3: Cross multiply
    1,089.20x = 1,632.58 × 471.98
  4. Step 4: Simplify right side
    1,089.20x = 770,535.77
  5. Step 5: Solve for x
    x = 770,535.77/1,089.20
  6. Step 6: Final answer
    x = 707.44

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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.