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Finding the Fourth Proportional to 902.73, 1,354.10 and 415.79

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Solution

The fourth proportional to 902.73, 1,354.10 and 415.79 is: 623.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.73 : 1,354.10 = 415.79 : x
  2. Step 2: Convert to fraction form
    902.73/1,354.10 = 415.79/x
  3. Step 3: Cross multiply
    902.73x = 1,354.10 × 415.79
  4. Step 4: Simplify right side
    902.73x = 563,021.24
  5. Step 5: Solve for x
    x = 563,021.24/902.73
  6. Step 6: Final answer
    x = 623.69

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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.