Home / 720,359.32-1,080,199.86-420,926.36

Finding the Fourth Proportional to 720,359.32, 1,080,199.86 and 420,926.36

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Solution

The fourth proportional to 720,359.32, 1,080,199.86 and 420,926.36 is: 631,191.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,359.32 : 1,080,199.86 = 420,926.36 : x
  2. Step 2: Convert to fraction form
    720,359.32/1,080,199.86 = 420,926.36/x
  3. Step 3: Cross multiply
    720,359.32x = 1,080,199.86 × 420,926.36
  4. Step 4: Simplify right side
    720,359.32x = 454,684,595,142.31
  5. Step 5: Solve for x
    x = 454,684,595,142.31/720,359.32
  6. Step 6: Final answer
    x = 631,191.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.