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Finding the Fourth Proportional to 554.28, 830.12 and 279.70

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Solution

The fourth proportional to 554.28, 830.12 and 279.70 is: 418.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.28 : 830.12 = 279.70 : x
  2. Step 2: Convert to fraction form
    554.28/830.12 = 279.70/x
  3. Step 3: Cross multiply
    554.28x = 830.12 × 279.70
  4. Step 4: Simplify right side
    554.28x = 232,188.12
  5. Step 5: Solve for x
    x = 232,188.12/554.28
  6. Step 6: Final answer
    x = 418.90

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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.