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Finding the Fourth Proportional to 420,227.11, 579,940.82 and 238,955.91

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Solution

The fourth proportional to 420,227.11, 579,940.82 and 238,955.91 is: 329,774.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,227.11 : 579,940.82 = 238,955.91 : x
  2. Step 2: Convert to fraction form
    420,227.11/579,940.82 = 238,955.91/x
  3. Step 3: Cross multiply
    420,227.11x = 579,940.82 × 238,955.91
  4. Step 4: Simplify right side
    420,227.11x = 138,580,286,389.25
  5. Step 5: Solve for x
    x = 138,580,286,389.25/420,227.11
  6. Step 6: Final answer
    x = 329,774.74

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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.