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Finding the Fourth Proportional to 342,978.64, 513,546.36 and 279,538.72

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Solution

The fourth proportional to 342,978.64, 513,546.36 and 279,538.72 is: 418,556.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,978.64 : 513,546.36 = 279,538.72 : x
  2. Step 2: Convert to fraction form
    342,978.64/513,546.36 = 279,538.72/x
  3. Step 3: Cross multiply
    342,978.64x = 513,546.36 × 279,538.72
  4. Step 4: Simplify right side
    342,978.64x = 143,556,092,135.06
  5. Step 5: Solve for x
    x = 143,556,092,135.06/342,978.64
  6. Step 6: Final answer
    x = 418,556.95

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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.