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Finding the Fourth Proportional to 654.04, 902.80 and 405.56

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Solution

The fourth proportional to 654.04, 902.80 and 405.56 is: 559.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.04 : 902.80 = 405.56 : x
  2. Step 2: Convert to fraction form
    654.04/902.80 = 405.56/x
  3. Step 3: Cross multiply
    654.04x = 902.80 × 405.56
  4. Step 4: Simplify right side
    654.04x = 366,139.57
  5. Step 5: Solve for x
    x = 366,139.57/654.04
  6. Step 6: Final answer
    x = 559.81

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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.