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Finding the Fourth Proportional to 934.09, 1,288.99 and 514.44

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Solution

The fourth proportional to 934.09, 1,288.99 and 514.44 is: 709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.09 : 1,288.99 = 514.44 : x
  2. Step 2: Convert to fraction form
    934.09/1,288.99 = 514.44/x
  3. Step 3: Cross multiply
    934.09x = 1,288.99 × 514.44
  4. Step 4: Simplify right side
    934.09x = 663,106.73
  5. Step 5: Solve for x
    x = 663,106.73/934.09
  6. Step 6: Final answer
    x = 709.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.