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Finding the Fourth Proportional to 284.16, 392.54 and 219.50

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Solution

The fourth proportional to 284.16, 392.54 and 219.50 is: 303.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.16 : 392.54 = 219.50 : x
  2. Step 2: Convert to fraction form
    284.16/392.54 = 219.50/x
  3. Step 3: Cross multiply
    284.16x = 392.54 × 219.50
  4. Step 4: Simplify right side
    284.16x = 86,162.53
  5. Step 5: Solve for x
    x = 86,162.53/284.16
  6. Step 6: Final answer
    x = 303.22

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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.