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Finding the Fourth Proportional to 279,357, 385,445.43 and 164,640.21

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Solution

The fourth proportional to 279,357, 385,445.43 and 164,640.21 is: 227,163.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,357 : 385,445.43 = 164,640.21 : x
  2. Step 2: Convert to fraction form
    279,357/385,445.43 = 164,640.21/x
  3. Step 3: Cross multiply
    279,357x = 385,445.43 × 164,640.21
  4. Step 4: Simplify right side
    279,357x = 63,459,816,538.74
  5. Step 5: Solve for x
    x = 63,459,816,538.74/279,357
  6. Step 6: Final answer
    x = 227,163.87

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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.