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Finding the Fourth Proportional to 567.50, 783.18 and 331.61

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Solution

The fourth proportional to 567.50, 783.18 and 331.61 is: 457.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.50 : 783.18 = 331.61 : x
  2. Step 2: Convert to fraction form
    567.50/783.18 = 331.61/x
  3. Step 3: Cross multiply
    567.50x = 783.18 × 331.61
  4. Step 4: Simplify right side
    567.50x = 259,706.40
  5. Step 5: Solve for x
    x = 259,706.40/567.50
  6. Step 6: Final answer
    x = 457.63

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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.