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Finding the Fourth Proportional to 304.74, 455.01 and 261.34

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Solution

The fourth proportional to 304.74, 455.01 and 261.34 is: 390.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.74 : 455.01 = 261.34 : x
  2. Step 2: Convert to fraction form
    304.74/455.01 = 261.34/x
  3. Step 3: Cross multiply
    304.74x = 455.01 × 261.34
  4. Step 4: Simplify right side
    304.74x = 118,910.20
  5. Step 5: Solve for x
    x = 118,910.20/304.74
  6. Step 6: Final answer
    x = 390.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.