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Finding the Fourth Proportional to 713,676, 984,872.88 and 395,724

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Solution

The fourth proportional to 713,676, 984,872.88 and 395,724 is: 546,099.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,676 : 984,872.88 = 395,724 : x
  2. Step 2: Convert to fraction form
    713,676/984,872.88 = 395,724/x
  3. Step 3: Cross multiply
    713,676x = 984,872.88 × 395,724
  4. Step 4: Simplify right side
    713,676x = 389,737,835,565.12
  5. Step 5: Solve for x
    x = 389,737,835,565.12/713,676
  6. Step 6: Final answer
    x = 546,099.12

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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.