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Finding the Fourth Proportional to 356,396.36, 491,640.34 and 220,386.92

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Solution

The fourth proportional to 356,396.36, 491,640.34 and 220,386.92 is: 304,018.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,396.36 : 491,640.34 = 220,386.92 : x
  2. Step 2: Convert to fraction form
    356,396.36/491,640.34 = 220,386.92/x
  3. Step 3: Cross multiply
    356,396.36x = 491,640.34 × 220,386.92
  4. Step 4: Simplify right side
    356,396.36x = 108,351,100,280.35
  5. Step 5: Solve for x
    x = 108,351,100,280.35/356,396.36
  6. Step 6: Final answer
    x = 304,018.54

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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.