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Finding the Fourth Proportional to 716,471.94, 988,731.23 and 394,175.12

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Solution

The fourth proportional to 716,471.94, 988,731.23 and 394,175.12 is: 543,961.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,471.94 : 988,731.23 = 394,175.12 : x
  2. Step 2: Convert to fraction form
    716,471.94/988,731.23 = 394,175.12/x
  3. Step 3: Cross multiply
    716,471.94x = 988,731.23 × 394,175.12
  4. Step 4: Simplify right side
    716,471.94x = 389,733,244,318.47
  5. Step 5: Solve for x
    x = 389,733,244,318.47/716,471.94
  6. Step 6: Final answer
    x = 543,961.63

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Double scale
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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.