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Finding the Fourth Proportional to 641,953.87, 885,895.79 and 355,473.95

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Solution

The fourth proportional to 641,953.87, 885,895.79 and 355,473.95 is: 490,553.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,953.87 : 885,895.79 = 355,473.95 : x
  2. Step 2: Convert to fraction form
    641,953.87/885,895.79 = 355,473.95/x
  3. Step 3: Cross multiply
    641,953.87x = 885,895.79 × 355,473.95
  4. Step 4: Simplify right side
    641,953.87x = 314,912,869,552.82
  5. Step 5: Solve for x
    x = 314,912,869,552.82/641,953.87
  6. Step 6: Final answer
    x = 490,553.74

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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.