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Finding the Fourth Proportional to 945.34, 1,418.56 and 397.48

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Solution

The fourth proportional to 945.34, 1,418.56 and 397.48 is: 596.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.34 : 1,418.56 = 397.48 : x
  2. Step 2: Convert to fraction form
    945.34/1,418.56 = 397.48/x
  3. Step 3: Cross multiply
    945.34x = 1,418.56 × 397.48
  4. Step 4: Simplify right side
    945.34x = 563,849.23
  5. Step 5: Solve for x
    x = 563,849.23/945.34
  6. Step 6: Final answer
    x = 596.45

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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.