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Finding the Fourth Proportional to 945.85, 1,418.41 and 452.13

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Solution

The fourth proportional to 945.85, 1,418.41 and 452.13 is: 678.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.85 : 1,418.41 = 452.13 : x
  2. Step 2: Convert to fraction form
    945.85/1,418.41 = 452.13/x
  3. Step 3: Cross multiply
    945.85x = 1,418.41 × 452.13
  4. Step 4: Simplify right side
    945.85x = 641,299.83
  5. Step 5: Solve for x
    x = 641,299.83/945.85
  6. Step 6: Final answer
    x = 678.01

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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.