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Finding the Fourth Proportional to 415.69, 622.18 and 291.67

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Solution

The fourth proportional to 415.69, 622.18 and 291.67 is: 436.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.69 : 622.18 = 291.67 : x
  2. Step 2: Convert to fraction form
    415.69/622.18 = 291.67/x
  3. Step 3: Cross multiply
    415.69x = 622.18 × 291.67
  4. Step 4: Simplify right side
    415.69x = 181,471.24
  5. Step 5: Solve for x
    x = 181,471.24/415.69
  6. Step 6: Final answer
    x = 436.55

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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.