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Finding the Fourth Proportional to 934.92, 1,289.88 and 669.42

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Solution

The fourth proportional to 934.92, 1,289.88 and 669.42 is: 923.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.92 : 1,289.88 = 669.42 : x
  2. Step 2: Convert to fraction form
    934.92/1,289.88 = 669.42/x
  3. Step 3: Cross multiply
    934.92x = 1,289.88 × 669.42
  4. Step 4: Simplify right side
    934.92x = 863,471.47
  5. Step 5: Solve for x
    x = 863,471.47/934.92
  6. Step 6: Final answer
    x = 923.58

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1.5x scale

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.