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Finding the Fourth Proportional to 340.50, 469.74 and 261.68

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Solution

The fourth proportional to 340.50, 469.74 and 261.68 is: 361.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.50 : 469.74 = 261.68 : x
  2. Step 2: Convert to fraction form
    340.50/469.74 = 261.68/x
  3. Step 3: Cross multiply
    340.50x = 469.74 × 261.68
  4. Step 4: Simplify right side
    340.50x = 122,921.56
  5. Step 5: Solve for x
    x = 122,921.56/340.50
  6. Step 6: Final answer
    x = 361.00

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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.