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Finding the Fourth Proportional to 946.60, 1,418.92 and 330.08

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Solution

The fourth proportional to 946.60, 1,418.92 and 330.08 is: 494.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.60 : 1,418.92 = 330.08 : x
  2. Step 2: Convert to fraction form
    946.60/1,418.92 = 330.08/x
  3. Step 3: Cross multiply
    946.60x = 1,418.92 × 330.08
  4. Step 4: Simplify right side
    946.60x = 468,357.11
  5. Step 5: Solve for x
    x = 468,357.11/946.60
  6. Step 6: Final answer
    x = 494.78

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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.