Home / 1,089.57-1,632.20-512.85

Finding the Fourth Proportional to 1,089.57, 1,632.20 and 512.85

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Solution

The fourth proportional to 1,089.57, 1,632.20 and 512.85 is: 768.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.57 : 1,632.20 = 512.85 : x
  2. Step 2: Convert to fraction form
    1,089.57/1,632.20 = 512.85/x
  3. Step 3: Cross multiply
    1,089.57x = 1,632.20 × 512.85
  4. Step 4: Simplify right side
    1,089.57x = 837,071.21
  5. Step 5: Solve for x
    x = 837,071.21/1,089.57
  6. Step 6: Final answer
    x = 768.26

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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.