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Finding the Fourth Proportional to 340.32, 511.08 and 285.96

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Solution

The fourth proportional to 340.32, 511.08 and 285.96 is: 429.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.32 : 511.08 = 285.96 : x
  2. Step 2: Convert to fraction form
    340.32/511.08 = 285.96/x
  3. Step 3: Cross multiply
    340.32x = 511.08 × 285.96
  4. Step 4: Simplify right side
    340.32x = 146,148.44
  5. Step 5: Solve for x
    x = 146,148.44/340.32
  6. Step 6: Final answer
    x = 429.44

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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.