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Finding the Fourth Proportional to 325,327.30, 485,776.50 and 287,057.63

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Solution

The fourth proportional to 325,327.30, 485,776.50 and 287,057.63 is: 428,632.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,327.30 : 485,776.50 = 287,057.63 : x
  2. Step 2: Convert to fraction form
    325,327.30/485,776.50 = 287,057.63/x
  3. Step 3: Cross multiply
    325,327.30x = 485,776.50 × 287,057.63
  4. Step 4: Simplify right side
    325,327.30x = 139,445,850,937.67
  5. Step 5: Solve for x
    x = 139,445,850,937.67/325,327.30
  6. Step 6: Final answer
    x = 428,632.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.