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Finding the Fourth Proportional to 518,728.74, 778,161.15 and 203,144.64

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Solution

The fourth proportional to 518,728.74, 778,161.15 and 203,144.64 is: 304,743.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,728.74 : 778,161.15 = 203,144.64 : x
  2. Step 2: Convert to fraction form
    518,728.74/778,161.15 = 203,144.64/x
  3. Step 3: Cross multiply
    518,728.74x = 778,161.15 × 203,144.64
  4. Step 4: Simplify right side
    518,728.74x = 158,079,266,678.74
  5. Step 5: Solve for x
    x = 158,079,266,678.74/518,728.74
  6. Step 6: Final answer
    x = 304,743.61

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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.