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Finding the Fourth Proportional to 716,390.60, 988,580.03 and 394,048.67

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Solution

The fourth proportional to 716,390.60, 988,580.03 and 394,048.67 is: 543,765.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,390.60 : 988,580.03 = 394,048.67 : x
  2. Step 2: Convert to fraction form
    716,390.60/988,580.03 = 394,048.67/x
  3. Step 3: Cross multiply
    716,390.60x = 988,580.03 × 394,048.67
  4. Step 4: Simplify right side
    716,390.60x = 389,548,639,096.92
  5. Step 5: Solve for x
    x = 389,548,639,096.92/716,390.60
  6. Step 6: Final answer
    x = 543,765.71

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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.