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Finding the Fourth Proportional to 437.86, 656.70 and 206.65

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Solution

The fourth proportional to 437.86, 656.70 and 206.65 is: 309.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.86 : 656.70 = 206.65 : x
  2. Step 2: Convert to fraction form
    437.86/656.70 = 206.65/x
  3. Step 3: Cross multiply
    437.86x = 656.70 × 206.65
  4. Step 4: Simplify right side
    437.86x = 135,707.06
  5. Step 5: Solve for x
    x = 135,707.06/437.86
  6. Step 6: Final answer
    x = 309.93

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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.