Home / 786,390.39-1,179,285.81-280,856.97

Finding the Fourth Proportional to 786,390.39, 1,179,285.81 and 280,856.97

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Solution

The fourth proportional to 786,390.39, 1,179,285.81 and 280,856.97 is: 421,178.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,390.39 : 1,179,285.81 = 280,856.97 : x
  2. Step 2: Convert to fraction form
    786,390.39/1,179,285.81 = 280,856.97/x
  3. Step 3: Cross multiply
    786,390.39x = 1,179,285.81 × 280,856.97
  4. Step 4: Simplify right side
    786,390.39x = 331,210,639,360.60
  5. Step 5: Solve for x
    x = 331,210,639,360.60/786,390.39
  6. Step 6: Final answer
    x = 421,178.39

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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.