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Finding the Fourth Proportional to 878.27, 1,316.79 and 384.44

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Solution

The fourth proportional to 878.27, 1,316.79 and 384.44 is: 576.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    878.27 : 1,316.79 = 384.44 : x
  2. Step 2: Convert to fraction form
    878.27/1,316.79 = 384.44/x
  3. Step 3: Cross multiply
    878.27x = 1,316.79 × 384.44
  4. Step 4: Simplify right side
    878.27x = 506,225.49
  5. Step 5: Solve for x
    x = 506,225.49/878.27
  6. Step 6: Final answer
    x = 576.39

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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.