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Finding the Fourth Proportional to 356,078.45, 491,394.36 and 220,108.91

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Solution

The fourth proportional to 356,078.45, 491,394.36 and 220,108.91 is: 303,754.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,078.45 : 491,394.36 = 220,108.91 : x
  2. Step 2: Convert to fraction form
    356,078.45/491,394.36 = 220,108.91/x
  3. Step 3: Cross multiply
    356,078.45x = 491,394.36 × 220,108.91
  4. Step 4: Simplify right side
    356,078.45x = 108,160,274,502.78
  5. Step 5: Solve for x
    x = 108,160,274,502.78/356,078.45
  6. Step 6: Final answer
    x = 303,754.06

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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.