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Finding the Fourth Proportional to 326,086.40, 488,546.40 and 279,430.40

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Solution

The fourth proportional to 326,086.40, 488,546.40 and 279,430.40 is: 418,645.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,086.40 : 488,546.40 = 279,430.40 : x
  2. Step 2: Convert to fraction form
    326,086.40/488,546.40 = 279,430.40/x
  3. Step 3: Cross multiply
    326,086.40x = 488,546.40 × 279,430.40
  4. Step 4: Simplify right side
    326,086.40x = 136,514,715,970.56
  5. Step 5: Solve for x
    x = 136,514,715,970.56/326,086.40
  6. Step 6: Final answer
    x = 418,645.84

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1.5x scale

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.