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Finding the Fourth Proportional to 689,993.76, 952,138.80 and 388,129.44

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Solution

The fourth proportional to 689,993.76, 952,138.80 and 388,129.44 is: 535,589.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,993.76 : 952,138.80 = 388,129.44 : x
  2. Step 2: Convert to fraction form
    689,993.76/952,138.80 = 388,129.44/x
  3. Step 3: Cross multiply
    689,993.76x = 952,138.80 × 388,129.44
  4. Step 4: Simplify right side
    689,993.76x = 369,553,099,246.27
  5. Step 5: Solve for x
    x = 369,553,099,246.27/689,993.76
  6. Step 6: Final answer
    x = 535,589.05

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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.