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Finding the Fourth Proportional to 945.32, 1,418.15 and 328.85

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Solution

The fourth proportional to 945.32, 1,418.15 and 328.85 is: 493.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.32 : 1,418.15 = 328.85 : x
  2. Step 2: Convert to fraction form
    945.32/1,418.15 = 328.85/x
  3. Step 3: Cross multiply
    945.32x = 1,418.15 × 328.85
  4. Step 4: Simplify right side
    945.32x = 466,352.36
  5. Step 5: Solve for x
    x = 466,352.36/945.32
  6. Step 6: Final answer
    x = 493.33

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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.