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Finding the Fourth Proportional to 164.87, 247.30 and 56.65

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Solution

The fourth proportional to 164.87, 247.30 and 56.65 is: 84.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.87 : 247.30 = 56.65 : x
  2. Step 2: Convert to fraction form
    164.87/247.30 = 56.65/x
  3. Step 3: Cross multiply
    164.87x = 247.30 × 56.65
  4. Step 4: Simplify right side
    164.87x = 14,009.55
  5. Step 5: Solve for x
    x = 14,009.55/164.87
  6. Step 6: Final answer
    x = 84.97

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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.