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Finding the Fourth Proportional to 638,196.80, 880,711.56 and 351,716.88

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Solution

The fourth proportional to 638,196.80, 880,711.56 and 351,716.88 is: 485,369.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,196.80 : 880,711.56 = 351,716.88 : x
  2. Step 2: Convert to fraction form
    638,196.80/880,711.56 = 351,716.88/x
  3. Step 3: Cross multiply
    638,196.80x = 880,711.56 × 351,716.88
  4. Step 4: Simplify right side
    638,196.80x = 309,761,122,063.13
  5. Step 5: Solve for x
    x = 309,761,122,063.13/638,196.80
  6. Step 6: Final answer
    x = 485,369.28

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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.