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Finding the Fourth Proportional to 218,997.72, 328,295.70 and 143,998.20

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Solution

The fourth proportional to 218,997.72, 328,295.70 and 143,998.20 is: 215,865.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,997.72 : 328,295.70 = 143,998.20 : x
  2. Step 2: Convert to fraction form
    218,997.72/328,295.70 = 143,998.20/x
  3. Step 3: Cross multiply
    218,997.72x = 328,295.70 × 143,998.20
  4. Step 4: Simplify right side
    218,997.72x = 47,273,989,867.74
  5. Step 5: Solve for x
    x = 47,273,989,867.74/218,997.72
  6. Step 6: Final answer
    x = 215,865.21

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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.