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Finding the Fourth Proportional to 384.91, 576.79 and 286.95

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Solution

The fourth proportional to 384.91, 576.79 and 286.95 is: 429.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.91 : 576.79 = 286.95 : x
  2. Step 2: Convert to fraction form
    384.91/576.79 = 286.95/x
  3. Step 3: Cross multiply
    384.91x = 576.79 × 286.95
  4. Step 4: Simplify right side
    384.91x = 165,509.17
  5. Step 5: Solve for x
    x = 165,509.17/384.91
  6. Step 6: Final answer
    x = 429.99

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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.