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Finding the Fourth Proportional to 641,375.42, 885,191.49 and 369,390.38

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Solution

The fourth proportional to 641,375.42, 885,191.49 and 369,390.38 is: 509,812.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,375.42 : 885,191.49 = 369,390.38 : x
  2. Step 2: Convert to fraction form
    641,375.42/885,191.49 = 369,390.38/x
  3. Step 3: Cross multiply
    641,375.42x = 885,191.49 × 369,390.38
  4. Step 4: Simplify right side
    641,375.42x = 326,981,216,437.91
  5. Step 5: Solve for x
    x = 326,981,216,437.91/641,375.42
  6. Step 6: Final answer
    x = 509,812.52

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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.