Home / 1,292.69-1,938.89-512.52

Finding the Fourth Proportional to 1,292.69, 1,938.89 and 512.52

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Solution

The fourth proportional to 1,292.69, 1,938.89 and 512.52 is: 768.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.69 : 1,938.89 = 512.52 : x
  2. Step 2: Convert to fraction form
    1,292.69/1,938.89 = 512.52/x
  3. Step 3: Cross multiply
    1,292.69x = 1,938.89 × 512.52
  4. Step 4: Simplify right side
    1,292.69x = 993,721.18
  5. Step 5: Solve for x
    x = 993,721.18/1,292.69
  6. Step 6: Final answer
    x = 768.73

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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.