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Finding the Fourth Proportional to 654.05, 902.54 and 392.02

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Solution

The fourth proportional to 654.05, 902.54 and 392.02 is: 540.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.05 : 902.54 = 392.02 : x
  2. Step 2: Convert to fraction form
    654.05/902.54 = 392.02/x
  3. Step 3: Cross multiply
    654.05x = 902.54 × 392.02
  4. Step 4: Simplify right side
    654.05x = 353,812.45
  5. Step 5: Solve for x
    x = 353,812.45/654.05
  6. Step 6: Final answer
    x = 540.95

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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.