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Finding the Fourth Proportional to 210.81, 292.14 and 207.87

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Solution

The fourth proportional to 210.81, 292.14 and 207.87 is: 288.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.81 : 292.14 = 207.87 : x
  2. Step 2: Convert to fraction form
    210.81/292.14 = 207.87/x
  3. Step 3: Cross multiply
    210.81x = 292.14 × 207.87
  4. Step 4: Simplify right side
    210.81x = 60,727.14
  5. Step 5: Solve for x
    x = 60,727.14/210.81
  6. Step 6: Final answer
    x = 288.07

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.