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Finding the Fourth Proportional to 218,847.29, 328,299.64 and 85,710.25

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Solution

The fourth proportional to 218,847.29, 328,299.64 and 85,710.25 is: 128,576.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,847.29 : 328,299.64 = 85,710.25 : x
  2. Step 2: Convert to fraction form
    218,847.29/328,299.64 = 85,710.25/x
  3. Step 3: Cross multiply
    218,847.29x = 328,299.64 × 85,710.25
  4. Step 4: Simplify right side
    218,847.29x = 28,138,642,577.81
  5. Step 5: Solve for x
    x = 28,138,642,577.81/218,847.29
  6. Step 6: Final answer
    x = 128,576.61

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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.