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Finding the Fourth Proportional to 420,293.76, 580,039.74 and 239,062.38

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Solution

The fourth proportional to 420,293.76, 580,039.74 and 239,062.38 is: 329,925.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,293.76 : 580,039.74 = 239,062.38 : x
  2. Step 2: Convert to fraction form
    420,293.76/580,039.74 = 239,062.38/x
  3. Step 3: Cross multiply
    420,293.76x = 580,039.74 × 239,062.38
  4. Step 4: Simplify right side
    420,293.76x = 138,665,680,738.98
  5. Step 5: Solve for x
    x = 138,665,680,738.98/420,293.76
  6. Step 6: Final answer
    x = 329,925.62

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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.