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Finding the Fourth Proportional to 934.11, 1,289.15 and 514.54

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Solution

The fourth proportional to 934.11, 1,289.15 and 514.54 is: 710.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.11 : 1,289.15 = 514.54 : x
  2. Step 2: Convert to fraction form
    934.11/1,289.15 = 514.54/x
  3. Step 3: Cross multiply
    934.11x = 1,289.15 × 514.54
  4. Step 4: Simplify right side
    934.11x = 663,319.24
  5. Step 5: Solve for x
    x = 663,319.24/934.11
  6. Step 6: Final answer
    x = 710.11

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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.