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Finding the Fourth Proportional to 1,691.68, 2,334.40 and 945.67

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Solution

The fourth proportional to 1,691.68, 2,334.40 and 945.67 is: 1,304.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.68 : 2,334.40 = 945.67 : x
  2. Step 2: Convert to fraction form
    1,691.68/2,334.40 = 945.67/x
  3. Step 3: Cross multiply
    1,691.68x = 2,334.40 × 945.67
  4. Step 4: Simplify right side
    1,691.68x = 2,207,572.05
  5. Step 5: Solve for x
    x = 2,207,572.05/1,691.68
  6. Step 6: Final answer
    x = 1,304.96

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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.