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Finding the Fourth Proportional to 902.54, 1,353.92 and 415.94

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Solution

The fourth proportional to 902.54, 1,353.92 and 415.94 is: 623.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.54 : 1,353.92 = 415.94 : x
  2. Step 2: Convert to fraction form
    902.54/1,353.92 = 415.94/x
  3. Step 3: Cross multiply
    902.54x = 1,353.92 × 415.94
  4. Step 4: Simplify right side
    902.54x = 563,140.64
  5. Step 5: Solve for x
    x = 563,140.64/902.54
  6. Step 6: Final answer
    x = 623.95

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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.