Home / 420,899.90-580,697.79-239,566.46

Finding the Fourth Proportional to 420,899.90, 580,697.79 and 239,566.46

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Solution

The fourth proportional to 420,899.90, 580,697.79 and 239,566.46 is: 330,519.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,899.90 : 580,697.79 = 239,566.46 : x
  2. Step 2: Convert to fraction form
    420,899.90/580,697.79 = 239,566.46/x
  3. Step 3: Cross multiply
    420,899.90x = 580,697.79 × 239,566.46
  4. Step 4: Simplify right side
    420,899.90x = 139,115,713,880.12
  5. Step 5: Solve for x
    x = 139,115,713,880.12/420,899.90
  6. Step 6: Final answer
    x = 330,519.71

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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.