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Finding the Fourth Proportional to 214.47, 318.94 and 207.63

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Solution

The fourth proportional to 214.47, 318.94 and 207.63 is: 308.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.47 : 318.94 = 207.63 : x
  2. Step 2: Convert to fraction form
    214.47/318.94 = 207.63/x
  3. Step 3: Cross multiply
    214.47x = 318.94 × 207.63
  4. Step 4: Simplify right side
    214.47x = 66,220.99
  5. Step 5: Solve for x
    x = 66,220.99/214.47
  6. Step 6: Final answer
    x = 308.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.