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Finding the Fourth Proportional to 379,431.49, 569,169.51 and 142,776.22

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Solution

The fourth proportional to 379,431.49, 569,169.51 and 142,776.22 is: 214,172.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,431.49 : 569,169.51 = 142,776.22 : x
  2. Step 2: Convert to fraction form
    379,431.49/569,169.51 = 142,776.22/x
  3. Step 3: Cross multiply
    379,431.49x = 569,169.51 × 142,776.22
  4. Step 4: Simplify right side
    379,431.49x = 81,263,871,177.05
  5. Step 5: Solve for x
    x = 81,263,871,177.05/379,431.49
  6. Step 6: Final answer
    x = 214,172.71

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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.