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Finding the Fourth Proportional to 618,685.20, 927,916.56 and 281,645.28

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Solution

The fourth proportional to 618,685.20, 927,916.56 and 281,645.28 is: 422,417.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,685.20 : 927,916.56 = 281,645.28 : x
  2. Step 2: Convert to fraction form
    618,685.20/927,916.56 = 281,645.28/x
  3. Step 3: Cross multiply
    618,685.20x = 927,916.56 × 281,645.28
  4. Step 4: Simplify right side
    618,685.20x = 261,343,319,357.84
  5. Step 5: Solve for x
    x = 261,343,319,357.84/618,685.20
  6. Step 6: Final answer
    x = 422,417.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.