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Finding the Fourth Proportional to 715,496.94, 987,170.22 and 428,912.46

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Solution

The fourth proportional to 715,496.94, 987,170.22 and 428,912.46 is: 591,769.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,496.94 : 987,170.22 = 428,912.46 : x
  2. Step 2: Convert to fraction form
    715,496.94/987,170.22 = 428,912.46/x
  3. Step 3: Cross multiply
    715,496.94x = 987,170.22 × 428,912.46
  4. Step 4: Simplify right side
    715,496.94x = 423,409,607,498.94
  5. Step 5: Solve for x
    x = 423,409,607,498.94/715,496.94
  6. Step 6: Final answer
    x = 591,769.98

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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.