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Finding the Fourth Proportional to 325,099.80, 487,649.70 and 320,434.20

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Solution

The fourth proportional to 325,099.80, 487,649.70 and 320,434.20 is: 480,651.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,099.80 : 487,649.70 = 320,434.20 : x
  2. Step 2: Convert to fraction form
    325,099.80/487,649.70 = 320,434.20/x
  3. Step 3: Cross multiply
    325,099.80x = 487,649.70 × 320,434.20
  4. Step 4: Simplify right side
    325,099.80x = 156,259,641,499.74
  5. Step 5: Solve for x
    x = 156,259,641,499.74/325,099.80
  6. Step 6: Final answer
    x = 480,651.30

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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.