Home / 641,720.57-885,581.39-355,245.44

Finding the Fourth Proportional to 641,720.57, 885,581.39 and 355,245.44

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Solution

The fourth proportional to 641,720.57, 885,581.39 and 355,245.44 is: 490,242.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,720.57 : 885,581.39 = 355,245.44 : x
  2. Step 2: Convert to fraction form
    641,720.57/885,581.39 = 355,245.44/x
  3. Step 3: Cross multiply
    641,720.57x = 885,581.39 × 355,245.44
  4. Step 4: Simplify right side
    641,720.57x = 314,598,748,770.13
  5. Step 5: Solve for x
    x = 314,598,748,770.13/641,720.57
  6. Step 6: Final answer
    x = 490,242.58

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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.