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Finding the Fourth Proportional to 420,751.26, 580,673.34 and 239,424.30

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Solution

The fourth proportional to 420,751.26, 580,673.34 and 239,424.30 is: 330,426.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,751.26 : 580,673.34 = 239,424.30 : x
  2. Step 2: Convert to fraction form
    420,751.26/580,673.34 = 239,424.30/x
  3. Step 3: Cross multiply
    420,751.26x = 580,673.34 × 239,424.30
  4. Step 4: Simplify right side
    420,751.26x = 139,027,307,958.16
  5. Step 5: Solve for x
    x = 139,027,307,958.16/420,751.26
  6. Step 6: Final answer
    x = 330,426.36

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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.