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Finding the Fourth Proportional to 420,429.72, 580,523.60 and 338,497.72

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Solution

The fourth proportional to 420,429.72, 580,523.60 and 338,497.72 is: 467,393.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,429.72 : 580,523.60 = 338,497.72 : x
  2. Step 2: Convert to fraction form
    420,429.72/580,523.60 = 338,497.72/x
  3. Step 3: Cross multiply
    420,429.72x = 580,523.60 × 338,497.72
  4. Step 4: Simplify right side
    420,429.72x = 196,505,914,401.13
  5. Step 5: Solve for x
    x = 196,505,914,401.13/420,429.72
  6. Step 6: Final answer
    x = 467,393.01

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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.