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Finding the Fourth Proportional to 279,725.98, 419,545.40 and 153,428.36

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Solution

The fourth proportional to 279,725.98, 419,545.40 and 153,428.36 is: 230,118.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,725.98 : 419,545.40 = 153,428.36 : x
  2. Step 2: Convert to fraction form
    279,725.98/419,545.40 = 153,428.36/x
  3. Step 3: Cross multiply
    279,725.98x = 419,545.40 × 153,428.36
  4. Step 4: Simplify right side
    279,725.98x = 64,370,162,667.54
  5. Step 5: Solve for x
    x = 64,370,162,667.54/279,725.98
  6. Step 6: Final answer
    x = 230,118.64

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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.