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Finding the Fourth Proportional to 407.72, 611.58 and 335.43

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Solution

The fourth proportional to 407.72, 611.58 and 335.43 is: 503.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.72 : 611.58 = 335.43 : x
  2. Step 2: Convert to fraction form
    407.72/611.58 = 335.43/x
  3. Step 3: Cross multiply
    407.72x = 611.58 × 335.43
  4. Step 4: Simplify right side
    407.72x = 205,142.28
  5. Step 5: Solve for x
    x = 205,142.28/407.72
  6. Step 6: Final answer
    x = 503.15

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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.