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Finding the Fourth Proportional to 641,586.76, 885,379 and 355,100.70

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Solution

The fourth proportional to 641,586.76, 885,379 and 355,100.70 is: 490,033.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,586.76 : 885,379 = 355,100.70 : x
  2. Step 2: Convert to fraction form
    641,586.76/885,379 = 355,100.70/x
  3. Step 3: Cross multiply
    641,586.76x = 885,379 × 355,100.70
  4. Step 4: Simplify right side
    641,586.76x = 314,398,702,665.30
  5. Step 5: Solve for x
    x = 314,398,702,665.30/641,586.76
  6. Step 6: Final answer
    x = 490,033.03

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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.