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Finding the Fourth Proportional to 420,352.76, 580,099.56 and 239,090.78

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Solution

The fourth proportional to 420,352.76, 580,099.56 and 239,090.78 is: 329,952.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,352.76 : 580,099.56 = 239,090.78 : x
  2. Step 2: Convert to fraction form
    420,352.76/580,099.56 = 239,090.78/x
  3. Step 3: Cross multiply
    420,352.76x = 580,099.56 × 239,090.78
  4. Step 4: Simplify right side
    420,352.76x = 138,696,456,278.06
  5. Step 5: Solve for x
    x = 138,696,456,278.06/420,352.76
  6. Step 6: Final answer
    x = 329,952.53

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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.