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Finding the Fourth Proportional to 1,286.54, 1,929.69 and 362.18

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Solution

The fourth proportional to 1,286.54, 1,929.69 and 362.18 is: 543.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.54 : 1,929.69 = 362.18 : x
  2. Step 2: Convert to fraction form
    1,286.54/1,929.69 = 362.18/x
  3. Step 3: Cross multiply
    1,286.54x = 1,929.69 × 362.18
  4. Step 4: Simplify right side
    1,286.54x = 698,895.12
  5. Step 5: Solve for x
    x = 698,895.12/1,286.54
  6. Step 6: Final answer
    x = 543.24

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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.