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Finding the Fourth Proportional to 378,187.38, 521,922.69 and 208,437.30

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Solution

The fourth proportional to 378,187.38, 521,922.69 and 208,437.30 is: 287,656.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,187.38 : 521,922.69 = 208,437.30 : x
  2. Step 2: Convert to fraction form
    378,187.38/521,922.69 = 208,437.30/x
  3. Step 3: Cross multiply
    378,187.38x = 521,922.69 × 208,437.30
  4. Step 4: Simplify right side
    378,187.38x = 108,788,156,312.34
  5. Step 5: Solve for x
    x = 108,788,156,312.34/378,187.38
  6. Step 6: Final answer
    x = 287,656.76

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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.