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Finding the Fourth Proportional to 420,699.88, 580,652.58 and 239,424.04

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Solution

The fourth proportional to 420,699.88, 580,652.58 and 239,424.04 is: 330,454.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,699.88 : 580,652.58 = 239,424.04 : x
  2. Step 2: Convert to fraction form
    420,699.88/580,652.58 = 239,424.04/x
  3. Step 3: Cross multiply
    420,699.88x = 580,652.58 × 239,424.04
  4. Step 4: Simplify right side
    420,699.88x = 139,022,186,540.02
  5. Step 5: Solve for x
    x = 139,022,186,540.02/420,699.88
  6. Step 6: Final answer
    x = 330,454.54

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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.