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Finding the Fourth Proportional to 420,868.92, 580,775.58 and 239,625

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Solution

The fourth proportional to 420,868.92, 580,775.58 and 239,625 is: 330,669.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,868.92 : 580,775.58 = 239,625 : x
  2. Step 2: Convert to fraction form
    420,868.92/580,775.58 = 239,625/x
  3. Step 3: Cross multiply
    420,868.92x = 580,775.58 × 239,625
  4. Step 4: Simplify right side
    420,868.92x = 139,168,348,357.50
  5. Step 5: Solve for x
    x = 139,168,348,357.50/420,868.92
  6. Step 6: Final answer
    x = 330,669.10

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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.