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Finding the Fourth Proportional to 934.73, 1,288.38 and 685.96

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Solution

The fourth proportional to 934.73, 1,288.38 and 685.96 is: 945.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.73 : 1,288.38 = 685.96 : x
  2. Step 2: Convert to fraction form
    934.73/1,288.38 = 685.96/x
  3. Step 3: Cross multiply
    934.73x = 1,288.38 × 685.96
  4. Step 4: Simplify right side
    934.73x = 883,776.50
  5. Step 5: Solve for x
    x = 883,776.50/934.73
  6. Step 6: Final answer
    x = 945.49

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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.