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Finding the Fourth Proportional to 420,356.28, 580,104.50 and 239,094.33

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Solution

The fourth proportional to 420,356.28, 580,104.50 and 239,094.33 is: 329,957.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,356.28 : 580,104.50 = 239,094.33 : x
  2. Step 2: Convert to fraction form
    420,356.28/580,104.50 = 239,094.33/x
  3. Step 3: Cross multiply
    420,356.28x = 580,104.50 × 239,094.33
  4. Step 4: Simplify right side
    420,356.28x = 138,699,695,562.01
  5. Step 5: Solve for x
    x = 138,699,695,562.01/420,356.28
  6. Step 6: Final answer
    x = 329,957.47

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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.