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Finding the Fourth Proportional to 279,231.64, 385,128.49 and 193,334.38

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Solution

The fourth proportional to 279,231.64, 385,128.49 and 193,334.38 is: 266,655.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,231.64 : 385,128.49 = 193,334.38 : x
  2. Step 2: Convert to fraction form
    279,231.64/385,128.49 = 193,334.38/x
  3. Step 3: Cross multiply
    279,231.64x = 385,128.49 × 193,334.38
  4. Step 4: Simplify right side
    279,231.64x = 74,458,576,867.81
  5. Step 5: Solve for x
    x = 74,458,576,867.81/279,231.64
  6. Step 6: Final answer
    x = 266,655.23

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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.