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Finding the Fourth Proportional to 284.88, 393.78 and 237.98

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Solution

The fourth proportional to 284.88, 393.78 and 237.98 is: 328.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.88 : 393.78 = 237.98 : x
  2. Step 2: Convert to fraction form
    284.88/393.78 = 237.98/x
  3. Step 3: Cross multiply
    284.88x = 393.78 × 237.98
  4. Step 4: Simplify right side
    284.88x = 93,711.76
  5. Step 5: Solve for x
    x = 93,711.76/284.88
  6. Step 6: Final answer
    x = 328.95

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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.