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Finding the Fourth Proportional to 554.26, 830.70 and 280.42

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Solution

The fourth proportional to 554.26, 830.70 and 280.42 is: 420.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.26 : 830.70 = 280.42 : x
  2. Step 2: Convert to fraction form
    554.26/830.70 = 280.42/x
  3. Step 3: Cross multiply
    554.26x = 830.70 × 280.42
  4. Step 4: Simplify right side
    554.26x = 232,944.89
  5. Step 5: Solve for x
    x = 232,944.89/554.26
  6. Step 6: Final answer
    x = 420.28

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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.