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Finding the Fourth Proportional to 356,363.91, 491,595.78 and 220,354.38

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Solution

The fourth proportional to 356,363.91, 491,595.78 and 220,354.38 is: 303,973.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,363.91 : 491,595.78 = 220,354.38 : x
  2. Step 2: Convert to fraction form
    356,363.91/491,595.78 = 220,354.38/x
  3. Step 3: Cross multiply
    356,363.91x = 491,595.78 × 220,354.38
  4. Step 4: Simplify right side
    356,363.91x = 108,325,283,312.52
  5. Step 5: Solve for x
    x = 108,325,283,312.52/356,363.91
  6. Step 6: Final answer
    x = 303,973.78

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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.