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Finding the Fourth Proportional to 313.46, 432.44 and 208.60

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Solution

The fourth proportional to 313.46, 432.44 and 208.60 is: 287.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.46 : 432.44 = 208.60 : x
  2. Step 2: Convert to fraction form
    313.46/432.44 = 208.60/x
  3. Step 3: Cross multiply
    313.46x = 432.44 × 208.60
  4. Step 4: Simplify right side
    313.46x = 90,206.98
  5. Step 5: Solve for x
    x = 90,206.98/313.46
  6. Step 6: Final answer
    x = 287.78

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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.