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Finding the Fourth Proportional to 326,423.60, 488,979.30 and 220,135.40

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Solution

The fourth proportional to 326,423.60, 488,979.30 and 220,135.40 is: 329,760.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,423.60 : 488,979.30 = 220,135.40 : x
  2. Step 2: Convert to fraction form
    326,423.60/488,979.30 = 220,135.40/x
  3. Step 3: Cross multiply
    326,423.60x = 488,979.30 × 220,135.40
  4. Step 4: Simplify right side
    326,423.60x = 107,641,653,797.22
  5. Step 5: Solve for x
    x = 107,641,653,797.22/326,423.60
  6. Step 6: Final answer
    x = 329,760.64

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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.