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Finding the Fourth Proportional to 293.88, 405.47 and 206.40

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Solution

The fourth proportional to 293.88, 405.47 and 206.40 is: 284.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.88 : 405.47 = 206.40 : x
  2. Step 2: Convert to fraction form
    293.88/405.47 = 206.40/x
  3. Step 3: Cross multiply
    293.88x = 405.47 × 206.40
  4. Step 4: Simplify right side
    293.88x = 83,689.01
  5. Step 5: Solve for x
    x = 83,689.01/293.88
  6. Step 6: Final answer
    x = 284.77

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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.