Home / 399,820-597,438.20-304,520.80

Finding the Fourth Proportional to 399,820, 597,438.20 and 304,520.80

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Solution

The fourth proportional to 399,820, 597,438.20 and 304,520.80 is: 455,035.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,820 : 597,438.20 = 304,520.80 : x
  2. Step 2: Convert to fraction form
    399,820/597,438.20 = 304,520.80/x
  3. Step 3: Cross multiply
    399,820x = 597,438.20 × 304,520.80
  4. Step 4: Simplify right side
    399,820x = 181,932,358,614.56
  5. Step 5: Solve for x
    x = 181,932,358,614.56/399,820
  6. Step 6: Final answer
    x = 455,035.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.