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Finding the Fourth Proportional to 716,645.07, 988,949.25 and 394,354.98

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Solution

The fourth proportional to 716,645.07, 988,949.25 and 394,354.98 is: 544,198.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,645.07 : 988,949.25 = 394,354.98 : x
  2. Step 2: Convert to fraction form
    716,645.07/988,949.25 = 394,354.98/x
  3. Step 3: Cross multiply
    716,645.07x = 988,949.25 × 394,354.98
  4. Step 4: Simplify right side
    716,645.07x = 389,997,061,704.77
  5. Step 5: Solve for x
    x = 389,997,061,704.77/716,645.07
  6. Step 6: Final answer
    x = 544,198.35

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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.