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Finding the Fourth Proportional to 326,945.30, 490,120.86 and 291,515.90

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Solution

The fourth proportional to 326,945.30, 490,120.86 and 291,515.90 is: 437,008.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,945.30 : 490,120.86 = 291,515.90 : x
  2. Step 2: Convert to fraction form
    326,945.30/490,120.86 = 291,515.90/x
  3. Step 3: Cross multiply
    326,945.30x = 490,120.86 × 291,515.90
  4. Step 4: Simplify right side
    326,945.30x = 142,878,023,611.67
  5. Step 5: Solve for x
    x = 142,878,023,611.67/326,945.30
  6. Step 6: Final answer
    x = 437,008.95

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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.