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Finding the Fourth Proportional to 259.98, 389.22 and 156.95

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Solution

The fourth proportional to 259.98, 389.22 and 156.95 is: 234.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.98 : 389.22 = 156.95 : x
  2. Step 2: Convert to fraction form
    259.98/389.22 = 156.95/x
  3. Step 3: Cross multiply
    259.98x = 389.22 × 156.95
  4. Step 4: Simplify right side
    259.98x = 61,088.08
  5. Step 5: Solve for x
    x = 61,088.08/259.98
  6. Step 6: Final answer
    x = 234.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.