Home / 641,960.20-885,894.17-355,474.13

Finding the Fourth Proportional to 641,960.20, 885,894.17 and 355,474.13

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Solution

The fourth proportional to 641,960.20, 885,894.17 and 355,474.13 is: 490,548.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,960.20 : 885,894.17 = 355,474.13 : x
  2. Step 2: Convert to fraction form
    641,960.20/885,894.17 = 355,474.13/x
  3. Step 3: Cross multiply
    641,960.20x = 885,894.17 × 355,474.13
  4. Step 4: Simplify right side
    641,960.20x = 314,912,457,575.45
  5. Step 5: Solve for x
    x = 314,912,457,575.45/641,960.20
  6. Step 6: Final answer
    x = 490,548.26

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Double scale
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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.