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Finding the Fourth Proportional to 302.88, 417.47 and 214.39

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Solution

The fourth proportional to 302.88, 417.47 and 214.39 is: 295.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.88 : 417.47 = 214.39 : x
  2. Step 2: Convert to fraction form
    302.88/417.47 = 214.39/x
  3. Step 3: Cross multiply
    302.88x = 417.47 × 214.39
  4. Step 4: Simplify right side
    302.88x = 89,500.89
  5. Step 5: Solve for x
    x = 89,500.89/302.88
  6. Step 6: Final answer
    x = 295.50

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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.