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Finding the Fourth Proportional to 2,514, 3,771.32 and 690

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Solution

The fourth proportional to 2,514, 3,771.32 and 690 is: 1,035.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,514 : 3,771.32 = 690 : x
  2. Step 2: Convert to fraction form
    2,514/3,771.32 = 690/x
  3. Step 3: Cross multiply
    2,514x = 3,771.32 × 690
  4. Step 4: Simplify right side
    2,514x = 2,602,210.80
  5. Step 5: Solve for x
    x = 2,602,210.80/2,514
  6. Step 6: Final answer
    x = 1,035.09

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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.