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Finding the Fourth Proportional to 325,359.55, 485,824.55 and 287,089.88

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Solution

The fourth proportional to 325,359.55, 485,824.55 and 287,089.88 is: 428,680.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,359.55 : 485,824.55 = 287,089.88 : x
  2. Step 2: Convert to fraction form
    325,359.55/485,824.55 = 287,089.88/x
  3. Step 3: Cross multiply
    325,359.55x = 485,824.55 × 287,089.88
  4. Step 4: Simplify right side
    325,359.55x = 139,475,311,760.55
  5. Step 5: Solve for x
    x = 139,475,311,760.55/325,359.55
  6. Step 6: Final answer
    x = 428,680.55

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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.