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Finding the Fourth Proportional to 284.75, 392.59 and 210.94

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Solution

The fourth proportional to 284.75, 392.59 and 210.94 is: 290.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.75 : 392.59 = 210.94 : x
  2. Step 2: Convert to fraction form
    284.75/392.59 = 210.94/x
  3. Step 3: Cross multiply
    284.75x = 392.59 × 210.94
  4. Step 4: Simplify right side
    284.75x = 82,812.93
  5. Step 5: Solve for x
    x = 82,812.93/284.75
  6. Step 6: Final answer
    x = 290.83

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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.