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Finding the Fourth Proportional to 284.66, 392.98 and 219.28

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Solution

The fourth proportional to 284.66, 392.98 and 219.28 is: 302.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.66 : 392.98 = 219.28 : x
  2. Step 2: Convert to fraction form
    284.66/392.98 = 219.28/x
  3. Step 3: Cross multiply
    284.66x = 392.98 × 219.28
  4. Step 4: Simplify right side
    284.66x = 86,172.65
  5. Step 5: Solve for x
    x = 86,172.65/284.66
  6. Step 6: Final answer
    x = 302.72

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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.