Home / 641,621.49-885,344.97-355,140.89

Finding the Fourth Proportional to 641,621.49, 885,344.97 and 355,140.89

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Solution

The fourth proportional to 641,621.49, 885,344.97 and 355,140.89 is: 490,043.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,621.49 : 885,344.97 = 355,140.89 : x
  2. Step 2: Convert to fraction form
    641,621.49/885,344.97 = 355,140.89/x
  3. Step 3: Cross multiply
    641,621.49x = 885,344.97 × 355,140.89
  4. Step 4: Simplify right side
    641,621.49x = 314,422,200,602.82
  5. Step 5: Solve for x
    x = 314,422,200,602.82/641,621.49
  6. Step 6: Final answer
    x = 490,043.13

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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.