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Finding the Fourth Proportional to 327,820.60, 491,730.90 and 289,329.40

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Solution

The fourth proportional to 327,820.60, 491,730.90 and 289,329.40 is: 433,994.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,820.60 : 491,730.90 = 289,329.40 : x
  2. Step 2: Convert to fraction form
    327,820.60/491,730.90 = 289,329.40/x
  3. Step 3: Cross multiply
    327,820.60x = 491,730.90 × 289,329.40
  4. Step 4: Simplify right side
    327,820.60x = 142,272,206,258.46
  5. Step 5: Solve for x
    x = 142,272,206,258.46/327,820.60
  6. Step 6: Final answer
    x = 433,994.10

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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.