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Finding the Fourth Proportional to 318,979.78, 478,452.39 and 97,346.50

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Solution

The fourth proportional to 318,979.78, 478,452.39 and 97,346.50 is: 146,014.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,979.78 : 478,452.39 = 97,346.50 : x
  2. Step 2: Convert to fraction form
    318,979.78/478,452.39 = 97,346.50/x
  3. Step 3: Cross multiply
    318,979.78x = 478,452.39 × 97,346.50
  4. Step 4: Simplify right side
    318,979.78x = 46,575,665,583.14
  5. Step 5: Solve for x
    x = 46,575,665,583.14/318,979.78
  6. Step 6: Final answer
    x = 146,014.48

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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.