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Finding the Fourth Proportional to 478,974.83, 718,479.21 and 119,147.54

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Solution

The fourth proportional to 478,974.83, 718,479.21 and 119,147.54 is: 178,725.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,974.83 : 718,479.21 = 119,147.54 : x
  2. Step 2: Convert to fraction form
    478,974.83/718,479.21 = 119,147.54/x
  3. Step 3: Cross multiply
    478,974.83x = 718,479.21 × 119,147.54
  4. Step 4: Simplify right side
    478,974.83x = 85,605,030,412.64
  5. Step 5: Solve for x
    x = 85,605,030,412.64/478,974.83
  6. Step 6: Final answer
    x = 178,725.53

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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.