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Finding the Fourth Proportional to 303.67, 418.80 and 210.57

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Solution

The fourth proportional to 303.67, 418.80 and 210.57 is: 290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.67 : 418.80 = 210.57 : x
  2. Step 2: Convert to fraction form
    303.67/418.80 = 210.57/x
  3. Step 3: Cross multiply
    303.67x = 418.80 × 210.57
  4. Step 4: Simplify right side
    303.67x = 88,186.72
  5. Step 5: Solve for x
    x = 88,186.72/303.67
  6. Step 6: Final answer
    x = 290.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.