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Finding the Fourth Proportional to 554.27, 830.66 and 261.90

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Solution

The fourth proportional to 554.27, 830.66 and 261.90 is: 392.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.27 : 830.66 = 261.90 : x
  2. Step 2: Convert to fraction form
    554.27/830.66 = 261.90/x
  3. Step 3: Cross multiply
    554.27x = 830.66 × 261.90
  4. Step 4: Simplify right side
    554.27x = 217,548.54
  5. Step 5: Solve for x
    x = 217,548.54/554.27
  6. Step 6: Final answer
    x = 392.50

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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.