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Finding the Fourth Proportional to 659.98, 910.81 and 411.31

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Solution

The fourth proportional to 659.98, 910.81 and 411.31 is: 567.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.98 : 910.81 = 411.31 : x
  2. Step 2: Convert to fraction form
    659.98/910.81 = 411.31/x
  3. Step 3: Cross multiply
    659.98x = 910.81 × 411.31
  4. Step 4: Simplify right side
    659.98x = 374,625.26
  5. Step 5: Solve for x
    x = 374,625.26/659.98
  6. Step 6: Final answer
    x = 567.63

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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.