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Finding the Fourth Proportional to 420,019.74, 579,614.76 and 238,751.46

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Solution

The fourth proportional to 420,019.74, 579,614.76 and 238,751.46 is: 329,469.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,019.74 : 579,614.76 = 238,751.46 : x
  2. Step 2: Convert to fraction form
    420,019.74/579,614.76 = 238,751.46/x
  3. Step 3: Cross multiply
    420,019.74x = 579,614.76 × 238,751.46
  4. Step 4: Simplify right side
    420,019.74x = 138,383,870,187.55
  5. Step 5: Solve for x
    x = 138,383,870,187.55/420,019.74
  6. Step 6: Final answer
    x = 329,469.92

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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.