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Finding the Fourth Proportional to 365,621.17, 548,430.66 and 128,906.77

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Solution

The fourth proportional to 365,621.17, 548,430.66 and 128,906.77 is: 193,359.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,621.17 : 548,430.66 = 128,906.77 : x
  2. Step 2: Convert to fraction form
    365,621.17/548,430.66 = 128,906.77/x
  3. Step 3: Cross multiply
    365,621.17x = 548,430.66 × 128,906.77
  4. Step 4: Simplify right side
    365,621.17x = 70,696,424,949.57
  5. Step 5: Solve for x
    x = 70,696,424,949.57/365,621.17
  6. Step 6: Final answer
    x = 193,359.77

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1.5x scale

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.