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Finding the Fourth Proportional to 420,359.32, 580,108.64 and 239,097.32

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Solution

The fourth proportional to 420,359.32, 580,108.64 and 239,097.32 is: 329,961.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,359.32 : 580,108.64 = 239,097.32 : x
  2. Step 2: Convert to fraction form
    420,359.32/580,108.64 = 239,097.32/x
  3. Step 3: Cross multiply
    420,359.32x = 580,108.64 × 239,097.32
  4. Step 4: Simplify right side
    420,359.32x = 138,702,419,212.22
  5. Step 5: Solve for x
    x = 138,702,419,212.22/420,359.32
  6. Step 6: Final answer
    x = 329,961.56

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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.