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Finding the Fourth Proportional to 654.10, 902.38 and 388.51

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Solution

The fourth proportional to 654.10, 902.38 and 388.51 is: 535.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.10 : 902.38 = 388.51 : x
  2. Step 2: Convert to fraction form
    654.10/902.38 = 388.51/x
  3. Step 3: Cross multiply
    654.10x = 902.38 × 388.51
  4. Step 4: Simplify right side
    654.10x = 350,583.65
  5. Step 5: Solve for x
    x = 350,583.65/654.10
  6. Step 6: Final answer
    x = 535.98

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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.