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Finding the Fourth Proportional to 716,372.01, 988,562.21 and 394,061.67

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Solution

The fourth proportional to 716,372.01, 988,562.21 and 394,061.67 is: 543,787.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,372.01 : 988,562.21 = 394,061.67 : x
  2. Step 2: Convert to fraction form
    716,372.01/988,562.21 = 394,061.67/x
  3. Step 3: Cross multiply
    716,372.01x = 988,562.21 × 394,061.67
  4. Step 4: Simplify right side
    716,372.01x = 389,554,473,401.18
  5. Step 5: Solve for x
    x = 389,554,473,401.18/716,372.01
  6. Step 6: Final answer
    x = 543,787.96

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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.