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Finding the Fourth Proportional to 838,686, 1,258,038.72 and 207,605.28

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Solution

The fourth proportional to 838,686, 1,258,038.72 and 207,605.28 is: 311,410.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,686 : 1,258,038.72 = 207,605.28 : x
  2. Step 2: Convert to fraction form
    838,686/1,258,038.72 = 207,605.28/x
  3. Step 3: Cross multiply
    838,686x = 1,258,038.72 × 207,605.28
  4. Step 4: Simplify right side
    838,686x = 261,175,480,716.44
  5. Step 5: Solve for x
    x = 261,175,480,716.44/838,686
  6. Step 6: Final answer
    x = 311,410.33

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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.