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Finding the Fourth Proportional to 399,000.74, 550,620.72 and 255,760.74

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Solution

The fourth proportional to 399,000.74, 550,620.72 and 255,760.74 is: 352,949.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,000.74 : 550,620.72 = 255,760.74 : x
  2. Step 2: Convert to fraction form
    399,000.74/550,620.72 = 255,760.74/x
  3. Step 3: Cross multiply
    399,000.74x = 550,620.72 × 255,760.74
  4. Step 4: Simplify right side
    399,000.74x = 140,827,162,806.53
  5. Step 5: Solve for x
    x = 140,827,162,806.53/399,000.74
  6. Step 6: Final answer
    x = 352,949.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.