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Finding the Fourth Proportional to 878,363.87, 1,212,132.20 and 475,955.87

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Solution

The fourth proportional to 878,363.87, 1,212,132.20 and 475,955.87 is: 656,813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,363.87 : 1,212,132.20 = 475,955.87 : x
  2. Step 2: Convert to fraction form
    878,363.87/1,212,132.20 = 475,955.87/x
  3. Step 3: Cross multiply
    878,363.87x = 1,212,132.20 × 475,955.87
  4. Step 4: Simplify right side
    878,363.87x = 576,921,427,365.57
  5. Step 5: Solve for x
    x = 576,921,427,365.57/878,363.87
  6. Step 6: Final answer
    x = 656,813.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.