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Finding the Fourth Proportional to 618,428.94, 927,671.36 and 169,139.76

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Solution

The fourth proportional to 618,428.94, 927,671.36 and 169,139.76 is: 253,717.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,428.94 : 927,671.36 = 169,139.76 : x
  2. Step 2: Convert to fraction form
    618,428.94/927,671.36 = 169,139.76/x
  3. Step 3: Cross multiply
    618,428.94x = 927,671.36 × 169,139.76
  4. Step 4: Simplify right side
    618,428.94x = 156,906,110,343.58
  5. Step 5: Solve for x
    x = 156,906,110,343.58/618,428.94
  6. Step 6: Final answer
    x = 253,717.28

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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.