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Finding the Fourth Proportional to 378,559.38, 522,410.94 and 217,424.87

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Solution

The fourth proportional to 378,559.38, 522,410.94 and 217,424.87 is: 300,045.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,559.38 : 522,410.94 = 217,424.87 : x
  2. Step 2: Convert to fraction form
    378,559.38/522,410.94 = 217,424.87/x
  3. Step 3: Cross multiply
    378,559.38x = 522,410.94 × 217,424.87
  4. Step 4: Simplify right side
    378,559.38x = 113,585,128,104.02
  5. Step 5: Solve for x
    x = 113,585,128,104.02/378,559.38
  6. Step 6: Final answer
    x = 300,045.74

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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.