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Finding the Fourth Proportional to 448.07, 618.17 and 261.53

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Solution

The fourth proportional to 448.07, 618.17 and 261.53 is: 360.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.07 : 618.17 = 261.53 : x
  2. Step 2: Convert to fraction form
    448.07/618.17 = 261.53/x
  3. Step 3: Cross multiply
    448.07x = 618.17 × 261.53
  4. Step 4: Simplify right side
    448.07x = 161,665.60
  5. Step 5: Solve for x
    x = 161,665.60/448.07
  6. Step 6: Final answer
    x = 360.81

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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.