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Finding the Fourth Proportional to 554.15, 830.14 and 261.27

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Solution

The fourth proportional to 554.15, 830.14 and 261.27 is: 391.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.15 : 830.14 = 261.27 : x
  2. Step 2: Convert to fraction form
    554.15/830.14 = 261.27/x
  3. Step 3: Cross multiply
    554.15x = 830.14 × 261.27
  4. Step 4: Simplify right side
    554.15x = 216,890.68
  5. Step 5: Solve for x
    x = 216,890.68/554.15
  6. Step 6: Final answer
    x = 391.39

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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.