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Finding the Fourth Proportional to 218,997.76, 328,496.40 and 52,785.76

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Solution

The fourth proportional to 218,997.76, 328,496.40 and 52,785.76 is: 79,178.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,997.76 : 328,496.40 = 52,785.76 : x
  2. Step 2: Convert to fraction form
    218,997.76/328,496.40 = 52,785.76/x
  3. Step 3: Cross multiply
    218,997.76x = 328,496.40 × 52,785.76
  4. Step 4: Simplify right side
    218,997.76x = 17,339,932,131.26
  5. Step 5: Solve for x
    x = 17,339,932,131.26/218,997.76
  6. Step 6: Final answer
    x = 79,178.58

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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.