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Finding the Fourth Proportional to 284.37, 392.40 and 167.91

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Solution

The fourth proportional to 284.37, 392.40 and 167.91 is: 231.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.37 : 392.40 = 167.91 : x
  2. Step 2: Convert to fraction form
    284.37/392.40 = 167.91/x
  3. Step 3: Cross multiply
    284.37x = 392.40 × 167.91
  4. Step 4: Simplify right side
    284.37x = 65,887.88
  5. Step 5: Solve for x
    x = 65,887.88/284.37
  6. Step 6: Final answer
    x = 231.70

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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.