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Finding the Fourth Proportional to 471.80, 651.08 and 261.98

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Solution

The fourth proportional to 471.80, 651.08 and 261.98 is: 361.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.80 : 651.08 = 261.98 : x
  2. Step 2: Convert to fraction form
    471.80/651.08 = 261.98/x
  3. Step 3: Cross multiply
    471.80x = 651.08 × 261.98
  4. Step 4: Simplify right side
    471.80x = 170,569.94
  5. Step 5: Solve for x
    x = 170,569.94/471.80
  6. Step 6: Final answer
    x = 361.53

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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.