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Finding the Fourth Proportional to 302.61, 453.90 and 205.15

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Solution

The fourth proportional to 302.61, 453.90 and 205.15 is: 307.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.61 : 453.90 = 205.15 : x
  2. Step 2: Convert to fraction form
    302.61/453.90 = 205.15/x
  3. Step 3: Cross multiply
    302.61x = 453.90 × 205.15
  4. Step 4: Simplify right side
    302.61x = 93,117.59
  5. Step 5: Solve for x
    x = 93,117.59/302.61
  6. Step 6: Final answer
    x = 307.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.