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Finding the Fourth Proportional to 356,302.70, 491,511.39 and 220,293.17

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Solution

The fourth proportional to 356,302.70, 491,511.39 and 220,293.17 is: 303,889.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,302.70 : 491,511.39 = 220,293.17 : x
  2. Step 2: Convert to fraction form
    356,302.70/491,511.39 = 220,293.17/x
  3. Step 3: Cross multiply
    356,302.70x = 491,511.39 × 220,293.17
  4. Step 4: Simplify right side
    356,302.70x = 108,276,601,992.87
  5. Step 5: Solve for x
    x = 108,276,601,992.87/356,302.70
  6. Step 6: Final answer
    x = 303,889.37

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1.5x scale

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.