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Finding the Fourth Proportional to 716,320.28, 988,516.46 and 394,023.30

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Solution

The fourth proportional to 716,320.28, 988,516.46 and 394,023.30 is: 543,749.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,320.28 : 988,516.46 = 394,023.30 : x
  2. Step 2: Convert to fraction form
    716,320.28/988,516.46 = 394,023.30/x
  3. Step 3: Cross multiply
    716,320.28x = 988,516.46 × 394,023.30
  4. Step 4: Simplify right side
    716,320.28x = 389,498,515,703.40
  5. Step 5: Solve for x
    x = 389,498,515,703.40/716,320.28
  6. Step 6: Final answer
    x = 543,749.12

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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.