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Finding the Fourth Proportional to 996.30, 1,493.78 and 508.95

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Solution

The fourth proportional to 996.30, 1,493.78 and 508.95 is: 763.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.30 : 1,493.78 = 508.95 : x
  2. Step 2: Convert to fraction form
    996.30/1,493.78 = 508.95/x
  3. Step 3: Cross multiply
    996.30x = 1,493.78 × 508.95
  4. Step 4: Simplify right side
    996.30x = 760,256.79
  5. Step 5: Solve for x
    x = 760,256.79/996.30
  6. Step 6: Final answer
    x = 763.08

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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.