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Finding the Fourth Proportional to 878,144.64, 1,211,832 and 475,735.68

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Solution

The fourth proportional to 878,144.64, 1,211,832 and 475,735.68 is: 656,511.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,144.64 : 1,211,832 = 475,735.68 : x
  2. Step 2: Convert to fraction form
    878,144.64/1,211,832 = 475,735.68/x
  3. Step 3: Cross multiply
    878,144.64x = 1,211,832 × 475,735.68
  4. Step 4: Simplify right side
    878,144.64x = 576,511,720,565.76
  5. Step 5: Solve for x
    x = 576,511,720,565.76/878,144.64
  6. Step 6: Final answer
    x = 656,511.12

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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.