Home / 420,983.87-580,958.19-230,000.45

Finding the Fourth Proportional to 420,983.87, 580,958.19 and 230,000.45

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Solution

The fourth proportional to 420,983.87, 580,958.19 and 230,000.45 is: 317,400.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,983.87 : 580,958.19 = 230,000.45 : x
  2. Step 2: Convert to fraction form
    420,983.87/580,958.19 = 230,000.45/x
  3. Step 3: Cross multiply
    420,983.87x = 580,958.19 × 230,000.45
  4. Step 4: Simplify right side
    420,983.87x = 133,620,642,226.40
  5. Step 5: Solve for x
    x = 133,620,642,226.40/420,983.87
  6. Step 6: Final answer
    x = 317,400.86

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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.