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Finding the Fourth Proportional to 325,078.30, 487,617.45 and 320,412.70

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Solution

The fourth proportional to 325,078.30, 487,617.45 and 320,412.70 is: 480,619.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,078.30 : 487,617.45 = 320,412.70 : x
  2. Step 2: Convert to fraction form
    325,078.30/487,617.45 = 320,412.70/x
  3. Step 3: Cross multiply
    325,078.30x = 487,617.45 × 320,412.70
  4. Step 4: Simplify right side
    325,078.30x = 156,238,823,721.62
  5. Step 5: Solve for x
    x = 156,238,823,721.62/325,078.30
  6. Step 6: Final answer
    x = 480,619.05

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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.