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Finding the Fourth Proportional to 284.31, 392.37 and 159.99

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Solution

The fourth proportional to 284.31, 392.37 and 159.99 is: 220.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.31 : 392.37 = 159.99 : x
  2. Step 2: Convert to fraction form
    284.31/392.37 = 159.99/x
  3. Step 3: Cross multiply
    284.31x = 392.37 × 159.99
  4. Step 4: Simplify right side
    284.31x = 62,775.28
  5. Step 5: Solve for x
    x = 62,775.28/284.31
  6. Step 6: Final answer
    x = 220.80

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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.