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Finding the Fourth Proportional to 638,240.86, 880,760.96 and 347,855.04

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Solution

The fourth proportional to 638,240.86, 880,760.96 and 347,855.04 is: 480,033.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,240.86 : 880,760.96 = 347,855.04 : x
  2. Step 2: Convert to fraction form
    638,240.86/880,760.96 = 347,855.04/x
  3. Step 3: Cross multiply
    638,240.86x = 880,760.96 × 347,855.04
  4. Step 4: Simplify right side
    638,240.86x = 306,377,138,971.24
  5. Step 5: Solve for x
    x = 306,377,138,971.24/638,240.86
  6. Step 6: Final answer
    x = 480,033.73

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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.