Home / 378,488.18-522,289.80-217,229.72

Finding the Fourth Proportional to 378,488.18, 522,289.80 and 217,229.72

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Solution

The fourth proportional to 378,488.18, 522,289.80 and 217,229.72 is: 299,763.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,488.18 : 522,289.80 = 217,229.72 : x
  2. Step 2: Convert to fraction form
    378,488.18/522,289.80 = 217,229.72/x
  3. Step 3: Cross multiply
    378,488.18x = 522,289.80 × 217,229.72
  4. Step 4: Simplify right side
    378,488.18x = 113,456,867,012.86
  5. Step 5: Solve for x
    x = 113,456,867,012.86/378,488.18
  6. Step 6: Final answer
    x = 299,763.30

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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.