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Finding the Fourth Proportional to 639,942.93, 883,116 and 349,554.69

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Solution

The fourth proportional to 639,942.93, 883,116 and 349,554.69 is: 482,382.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,942.93 : 883,116 = 349,554.69 : x
  2. Step 2: Convert to fraction form
    639,942.93/883,116 = 349,554.69/x
  3. Step 3: Cross multiply
    639,942.93x = 883,116 × 349,554.69
  4. Step 4: Simplify right side
    639,942.93x = 308,697,339,614.04
  5. Step 5: Solve for x
    x = 308,697,339,614.04/639,942.93
  6. Step 6: Final answer
    x = 482,382.61

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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.