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Finding the Fourth Proportional to 945.81, 1,418.72 and 296.60

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Solution

The fourth proportional to 945.81, 1,418.72 and 296.60 is: 444.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.81 : 1,418.72 = 296.60 : x
  2. Step 2: Convert to fraction form
    945.81/1,418.72 = 296.60/x
  3. Step 3: Cross multiply
    945.81x = 1,418.72 × 296.60
  4. Step 4: Simplify right side
    945.81x = 420,783.78
  5. Step 5: Solve for x
    x = 420,783.78/945.81
  6. Step 6: Final answer
    x = 444.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.