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Finding the Fourth Proportional to 716,291.96, 988,462.06 and 394,001.98

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Solution

The fourth proportional to 716,291.96, 988,462.06 and 394,001.98 is: 543,711.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,291.96 : 988,462.06 = 394,001.98 : x
  2. Step 2: Convert to fraction form
    716,291.96/988,462.06 = 394,001.98/x
  3. Step 3: Cross multiply
    716,291.96x = 988,462.06 × 394,001.98
  4. Step 4: Simplify right side
    716,291.96x = 389,456,005,338.72
  5. Step 5: Solve for x
    x = 389,456,005,338.72/716,291.96
  6. Step 6: Final answer
    x = 543,711.27

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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.