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Finding the Fourth Proportional to 654.69, 903.16 and 405.92

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Solution

The fourth proportional to 654.69, 903.16 and 405.92 is: 559.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.69 : 903.16 = 405.92 : x
  2. Step 2: Convert to fraction form
    654.69/903.16 = 405.92/x
  3. Step 3: Cross multiply
    654.69x = 903.16 × 405.92
  4. Step 4: Simplify right side
    654.69x = 366,607.21
  5. Step 5: Solve for x
    x = 366,607.21/654.69
  6. Step 6: Final answer
    x = 559.97

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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.