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Finding the Fourth Proportional to 716,467.88, 988,725.65 and 394,171.07

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Solution

The fourth proportional to 716,467.88, 988,725.65 and 394,171.07 is: 543,956.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,467.88 : 988,725.65 = 394,171.07 : x
  2. Step 2: Convert to fraction form
    716,467.88/988,725.65 = 394,171.07/x
  3. Step 3: Cross multiply
    716,467.88x = 988,725.65 × 394,171.07
  4. Step 4: Simplify right side
    716,467.88x = 389,727,047,396.95
  5. Step 5: Solve for x
    x = 389,727,047,396.95/716,467.88
  6. Step 6: Final answer
    x = 543,956.06

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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.