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Finding the Fourth Proportional to 394,528, 544,450.56 and 215,680

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Solution

The fourth proportional to 394,528, 544,450.56 and 215,680 is: 297,639.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,528 : 544,450.56 = 215,680 : x
  2. Step 2: Convert to fraction form
    394,528/544,450.56 = 215,680/x
  3. Step 3: Cross multiply
    394,528x = 544,450.56 × 215,680
  4. Step 4: Simplify right side
    394,528x = 117,427,096,780.80
  5. Step 5: Solve for x
    x = 117,427,096,780.80/394,528
  6. Step 6: Final answer
    x = 297,639.45

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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.