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Finding the Fourth Proportional to 420,753.26, 580,676.10 and 239,426.30

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Solution

The fourth proportional to 420,753.26, 580,676.10 and 239,426.30 is: 330,429.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,753.26 : 580,676.10 = 239,426.30 : x
  2. Step 2: Convert to fraction form
    420,753.26/580,676.10 = 239,426.30/x
  3. Step 3: Cross multiply
    420,753.26x = 580,676.10 × 239,426.30
  4. Step 4: Simplify right side
    420,753.26x = 139,029,130,121.43
  5. Step 5: Solve for x
    x = 139,029,130,121.43/420,753.26
  6. Step 6: Final answer
    x = 330,429.12

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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.