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Finding the Fourth Proportional to 209,850.78, 313,153.04 and 187,422.78

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Solution

The fourth proportional to 209,850.78, 313,153.04 and 187,422.78 is: 279,684.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,850.78 : 313,153.04 = 187,422.78 : x
  2. Step 2: Convert to fraction form
    209,850.78/313,153.04 = 187,422.78/x
  3. Step 3: Cross multiply
    209,850.78x = 313,153.04 × 187,422.78
  4. Step 4: Simplify right side
    209,850.78x = 58,692,012,385.14
  5. Step 5: Solve for x
    x = 58,692,012,385.14/209,850.78
  6. Step 6: Final answer
    x = 279,684.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.