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Finding the Fourth Proportional to 420,653.44, 580,552.68 and 239,409.46

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Solution

The fourth proportional to 420,653.44, 580,552.68 and 239,409.46 is: 330,414.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,653.44 : 580,552.68 = 239,409.46 : x
  2. Step 2: Convert to fraction form
    420,653.44/580,552.68 = 239,409.46/x
  3. Step 3: Cross multiply
    420,653.44x = 580,552.68 × 239,409.46
  4. Step 4: Simplify right side
    420,653.44x = 138,989,803,620.35
  5. Step 5: Solve for x
    x = 138,989,803,620.35/420,653.44
  6. Step 6: Final answer
    x = 330,414.04

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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.