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Finding the Fourth Proportional to 654.16, 902.56 and 392.08

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Solution

The fourth proportional to 654.16, 902.56 and 392.08 is: 540.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.16 : 902.56 = 392.08 : x
  2. Step 2: Convert to fraction form
    654.16/902.56 = 392.08/x
  3. Step 3: Cross multiply
    654.16x = 902.56 × 392.08
  4. Step 4: Simplify right side
    654.16x = 353,875.72
  5. Step 5: Solve for x
    x = 353,875.72/654.16
  6. Step 6: Final answer
    x = 540.96

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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.