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Finding the Fourth Proportional to 283,640.84, 391,427.04 and 156,321.08

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Solution

The fourth proportional to 283,640.84, 391,427.04 and 156,321.08 is: 215,724.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,640.84 : 391,427.04 = 156,321.08 : x
  2. Step 2: Convert to fraction form
    283,640.84/391,427.04 = 156,321.08/x
  3. Step 3: Cross multiply
    283,640.84x = 391,427.04 × 156,321.08
  4. Step 4: Simplify right side
    283,640.84x = 61,188,297,634.00
  5. Step 5: Solve for x
    x = 61,188,297,634.00/283,640.84
  6. Step 6: Final answer
    x = 215,724.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.