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Finding the Fourth Proportional to 325,103.80, 487,655.70 and 320,438.20

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Solution

The fourth proportional to 325,103.80, 487,655.70 and 320,438.20 is: 480,657.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,103.80 : 487,655.70 = 320,438.20 : x
  2. Step 2: Convert to fraction form
    325,103.80/487,655.70 = 320,438.20/x
  3. Step 3: Cross multiply
    325,103.80x = 487,655.70 × 320,438.20
  4. Step 4: Simplify right side
    325,103.80x = 156,263,514,727.74
  5. Step 5: Solve for x
    x = 156,263,514,727.74/325,103.80
  6. Step 6: Final answer
    x = 480,657.30

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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.