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Finding the Fourth Proportional to 945.96, 1,418.82 and 252.66

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Solution

The fourth proportional to 945.96, 1,418.82 and 252.66 is: 378.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.96 : 1,418.82 = 252.66 : x
  2. Step 2: Convert to fraction form
    945.96/1,418.82 = 252.66/x
  3. Step 3: Cross multiply
    945.96x = 1,418.82 × 252.66
  4. Step 4: Simplify right side
    945.96x = 358,483.43
  5. Step 5: Solve for x
    x = 358,483.43/945.96
  6. Step 6: Final answer
    x = 378.96

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Double scale
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1.5x scale

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.