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Finding the Fourth Proportional to 340.49, 469.87 and 207.72

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Solution

The fourth proportional to 340.49, 469.87 and 207.72 is: 286.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.49 : 469.87 = 207.72 : x
  2. Step 2: Convert to fraction form
    340.49/469.87 = 207.72/x
  3. Step 3: Cross multiply
    340.49x = 469.87 × 207.72
  4. Step 4: Simplify right side
    340.49x = 97,600.88
  5. Step 5: Solve for x
    x = 97,600.88/340.49
  6. Step 6: Final answer
    x = 286.65

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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.