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Finding the Fourth Proportional to 231,728.40, 347,811.30 and 143,154.90

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Solution

The fourth proportional to 231,728.40, 347,811.30 and 143,154.90 is: 214,867.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,728.40 : 347,811.30 = 143,154.90 : x
  2. Step 2: Convert to fraction form
    231,728.40/347,811.30 = 143,154.90/x
  3. Step 3: Cross multiply
    231,728.40x = 347,811.30 × 143,154.90
  4. Step 4: Simplify right side
    231,728.40x = 49,790,891,870.37
  5. Step 5: Solve for x
    x = 49,790,891,870.37/231,728.40
  6. Step 6: Final answer
    x = 214,867.46

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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.