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Finding the Fourth Proportional to 284.89, 393.19 and 215.03

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Solution

The fourth proportional to 284.89, 393.19 and 215.03 is: 296.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.89 : 393.19 = 215.03 : x
  2. Step 2: Convert to fraction form
    284.89/393.19 = 215.03/x
  3. Step 3: Cross multiply
    284.89x = 393.19 × 215.03
  4. Step 4: Simplify right side
    284.89x = 84,545.75
  5. Step 5: Solve for x
    x = 84,545.75/284.89
  6. Step 6: Final answer
    x = 296.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.