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Finding the Fourth Proportional to 378,690.72, 522,595.98 and 208,930.92

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Solution

The fourth proportional to 378,690.72, 522,595.98 and 208,930.92 is: 288,326.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,690.72 : 522,595.98 = 208,930.92 : x
  2. Step 2: Convert to fraction form
    378,690.72/522,595.98 = 208,930.92/x
  3. Step 3: Cross multiply
    378,690.72x = 522,595.98 × 208,930.92
  4. Step 4: Simplify right side
    378,690.72x = 109,186,458,889.70
  5. Step 5: Solve for x
    x = 109,186,458,889.70/378,690.72
  6. Step 6: Final answer
    x = 288,326.21

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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.