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Finding the Fourth Proportional to 1,479.49, 2,218.96 and 492.32

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Solution

The fourth proportional to 1,479.49, 2,218.96 and 492.32 is: 738.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.49 : 2,218.96 = 492.32 : x
  2. Step 2: Convert to fraction form
    1,479.49/2,218.96 = 492.32/x
  3. Step 3: Cross multiply
    1,479.49x = 2,218.96 × 492.32
  4. Step 4: Simplify right side
    1,479.49x = 1,092,438.39
  5. Step 5: Solve for x
    x = 1,092,438.39/1,479.49
  6. Step 6: Final answer
    x = 738.39

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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.