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Finding the Fourth Proportional to 420,965.66, 580,959.42 and 239,693.42

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Solution

The fourth proportional to 420,965.66, 580,959.42 and 239,693.42 is: 330,792.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,965.66 : 580,959.42 = 239,693.42 : x
  2. Step 2: Convert to fraction form
    420,965.66/580,959.42 = 239,693.42/x
  3. Step 3: Cross multiply
    420,965.66x = 580,959.42 × 239,693.42
  4. Step 4: Simplify right side
    420,965.66x = 139,252,150,261.02
  5. Step 5: Solve for x
    x = 139,252,150,261.02/420,965.66
  6. Step 6: Final answer
    x = 330,792.18

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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.