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Finding the Fourth Proportional to 478,720.62, 718,078.74 and 123,704.46

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Solution

The fourth proportional to 478,720.62, 718,078.74 and 123,704.46 is: 185,556.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,720.62 : 718,078.74 = 123,704.46 : x
  2. Step 2: Convert to fraction form
    478,720.62/718,078.74 = 123,704.46/x
  3. Step 3: Cross multiply
    478,720.62x = 718,078.74 × 123,704.46
  4. Step 4: Simplify right side
    478,720.62x = 88,829,542,769.18
  5. Step 5: Solve for x
    x = 88,829,542,769.18/478,720.62
  6. Step 6: Final answer
    x = 185,556.12

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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.