Home / 420,621.70-580,459.92-229,639.48

Finding the Fourth Proportional to 420,621.70, 580,459.92 and 229,639.48

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Solution

The fourth proportional to 420,621.70, 580,459.92 and 229,639.48 is: 316,903.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,621.70 : 580,459.92 = 229,639.48 : x
  2. Step 2: Convert to fraction form
    420,621.70/580,459.92 = 229,639.48/x
  3. Step 3: Cross multiply
    420,621.70x = 580,459.92 × 229,639.48
  4. Step 4: Simplify right side
    420,621.70x = 133,296,514,189.64
  5. Step 5: Solve for x
    x = 133,296,514,189.64/420,621.70
  6. Step 6: Final answer
    x = 316,903.56

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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.