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Finding the Fourth Proportional to 945.55, 1,418.32 and 252.21

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Solution

The fourth proportional to 945.55, 1,418.32 and 252.21 is: 378.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.55 : 1,418.32 = 252.21 : x
  2. Step 2: Convert to fraction form
    945.55/1,418.32 = 252.21/x
  3. Step 3: Cross multiply
    945.55x = 1,418.32 × 252.21
  4. Step 4: Simplify right side
    945.55x = 357,714.49
  5. Step 5: Solve for x
    x = 357,714.49/945.55
  6. Step 6: Final answer
    x = 378.31

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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.