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Finding the Fourth Proportional to 641,958.49, 885,929.41 and 355,478.57

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Solution

The fourth proportional to 641,958.49, 885,929.41 and 355,478.57 is: 490,575.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,958.49 : 885,929.41 = 355,478.57 : x
  2. Step 2: Convert to fraction form
    641,958.49/885,929.41 = 355,478.57/x
  3. Step 3: Cross multiply
    641,958.49x = 885,929.41 × 355,478.57
  4. Step 4: Simplify right side
    641,958.49x = 314,928,919,787.74
  5. Step 5: Solve for x
    x = 314,928,919,787.74/641,958.49
  6. Step 6: Final answer
    x = 490,575.21

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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.