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Finding the Fourth Proportional to 282,343.38, 389,640.15 and 155,019.48

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Solution

The fourth proportional to 282,343.38, 389,640.15 and 155,019.48 is: 213,930.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,343.38 : 389,640.15 = 155,019.48 : x
  2. Step 2: Convert to fraction form
    282,343.38/389,640.15 = 155,019.48/x
  3. Step 3: Cross multiply
    282,343.38x = 389,640.15 × 155,019.48
  4. Step 4: Simplify right side
    282,343.38x = 60,401,813,440.12
  5. Step 5: Solve for x
    x = 60,401,813,440.12/282,343.38
  6. Step 6: Final answer
    x = 213,930.33

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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.