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Finding the Fourth Proportional to 399,037.60, 550,683.57 and 217,761.21

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Solution

The fourth proportional to 399,037.60, 550,683.57 and 217,761.21 is: 300,516.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,037.60 : 550,683.57 = 217,761.21 : x
  2. Step 2: Convert to fraction form
    399,037.60/550,683.57 = 217,761.21/x
  3. Step 3: Cross multiply
    399,037.60x = 550,683.57 × 217,761.21
  4. Step 4: Simplify right side
    399,037.60x = 119,917,520,734.47
  5. Step 5: Solve for x
    x = 119,917,520,734.47/399,037.60
  6. Step 6: Final answer
    x = 300,516.85

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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.