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Finding the Fourth Proportional to 716,378.01, 988,570.47 and 394,067.67

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Solution

The fourth proportional to 716,378.01, 988,570.47 and 394,067.67 is: 543,796.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,378.01 : 988,570.47 = 394,067.67 : x
  2. Step 2: Convert to fraction form
    716,378.01/988,570.47 = 394,067.67/x
  3. Step 3: Cross multiply
    716,378.01x = 988,570.47 × 394,067.67
  4. Step 4: Simplify right side
    716,378.01x = 389,563,661,743.71
  5. Step 5: Solve for x
    x = 389,563,661,743.71/716,378.01
  6. Step 6: Final answer
    x = 543,796.23

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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.