Home / 412,947.20-619,881.60-385,875.20

Finding the Fourth Proportional to 412,947.20, 619,881.60 and 385,875.20

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Solution

The fourth proportional to 412,947.20, 619,881.60 and 385,875.20 is: 579,243.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,947.20 : 619,881.60 = 385,875.20 : x
  2. Step 2: Convert to fraction form
    412,947.20/619,881.60 = 385,875.20/x
  3. Step 3: Cross multiply
    412,947.20x = 619,881.60 × 385,875.20
  4. Step 4: Simplify right side
    412,947.20x = 239,196,936,376.32
  5. Step 5: Solve for x
    x = 239,196,936,376.32/412,947.20
  6. Step 6: Final answer
    x = 579,243.39

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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.