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Finding the Fourth Proportional to 319.01, 477.50 and 261.09

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Solution

The fourth proportional to 319.01, 477.50 and 261.09 is: 390.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.01 : 477.50 = 261.09 : x
  2. Step 2: Convert to fraction form
    319.01/477.50 = 261.09/x
  3. Step 3: Cross multiply
    319.01x = 477.50 × 261.09
  4. Step 4: Simplify right side
    319.01x = 124,669.17
  5. Step 5: Solve for x
    x = 124,669.17/319.01
  6. Step 6: Final answer
    x = 390.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.