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Finding the Fourth Proportional to 307,755.90, 424,895.06 and 198,917.12

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Solution

The fourth proportional to 307,755.90, 424,895.06 and 198,917.12 is: 274,629.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,755.90 : 424,895.06 = 198,917.12 : x
  2. Step 2: Convert to fraction form
    307,755.90/424,895.06 = 198,917.12/x
  3. Step 3: Cross multiply
    307,755.90x = 424,895.06 × 198,917.12
  4. Step 4: Simplify right side
    307,755.90x = 84,518,903,196.96
  5. Step 5: Solve for x
    x = 84,518,903,196.96/307,755.90
  6. Step 6: Final answer
    x = 274,629.68

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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.