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Finding the Fourth Proportional to 284.60, 392.94 and 210.92

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Solution

The fourth proportional to 284.60, 392.94 and 210.92 is: 291.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.60 : 392.94 = 210.92 : x
  2. Step 2: Convert to fraction form
    284.60/392.94 = 210.92/x
  3. Step 3: Cross multiply
    284.60x = 392.94 × 210.92
  4. Step 4: Simplify right side
    284.60x = 82,878.90
  5. Step 5: Solve for x
    x = 82,878.90/284.60
  6. Step 6: Final answer
    x = 291.21

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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.