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Finding the Fourth Proportional to 303.18, 417.38 and 261.51

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Solution

The fourth proportional to 303.18, 417.38 and 261.51 is: 360.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.18 : 417.38 = 261.51 : x
  2. Step 2: Convert to fraction form
    303.18/417.38 = 261.51/x
  3. Step 3: Cross multiply
    303.18x = 417.38 × 261.51
  4. Step 4: Simplify right side
    303.18x = 109,147.74
  5. Step 5: Solve for x
    x = 109,147.74/303.18
  6. Step 6: Final answer
    x = 360.01

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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.