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Finding the Fourth Proportional to 420,993.66, 580,979.61 and 230,018.88

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Solution

The fourth proportional to 420,993.66, 580,979.61 and 230,018.88 is: 317,430.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,993.66 : 580,979.61 = 230,018.88 : x
  2. Step 2: Convert to fraction form
    420,993.66/580,979.61 = 230,018.88/x
  3. Step 3: Cross multiply
    420,993.66x = 580,979.61 × 230,018.88
  4. Step 4: Simplify right side
    420,993.66x = 133,636,279,195.04
  5. Step 5: Solve for x
    x = 133,636,279,195.04/420,993.66
  6. Step 6: Final answer
    x = 317,430.62

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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.