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Finding the Fourth Proportional to 985.96, 1,479.12 and 336.52

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Solution

The fourth proportional to 985.96, 1,479.12 and 336.52 is: 504.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.96 : 1,479.12 = 336.52 : x
  2. Step 2: Convert to fraction form
    985.96/1,479.12 = 336.52/x
  3. Step 3: Cross multiply
    985.96x = 1,479.12 × 336.52
  4. Step 4: Simplify right side
    985.96x = 497,753.46
  5. Step 5: Solve for x
    x = 497,753.46/985.96
  6. Step 6: Final answer
    x = 504.84

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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.