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Finding the Fourth Proportional to 284.77, 392.85 and 211.24

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Solution

The fourth proportional to 284.77, 392.85 and 211.24 is: 291.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.77 : 392.85 = 211.24 : x
  2. Step 2: Convert to fraction form
    284.77/392.85 = 211.24/x
  3. Step 3: Cross multiply
    284.77x = 392.85 × 211.24
  4. Step 4: Simplify right side
    284.77x = 82,985.63
  5. Step 5: Solve for x
    x = 82,985.63/284.77
  6. Step 6: Final answer
    x = 291.41

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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.