Home / 641,920.76-885,839.81-355,434.69

Finding the Fourth Proportional to 641,920.76, 885,839.81 and 355,434.69

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Solution

The fourth proportional to 641,920.76, 885,839.81 and 355,434.69 is: 490,493.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,920.76 : 885,839.81 = 355,434.69 : x
  2. Step 2: Convert to fraction form
    641,920.76/885,839.81 = 355,434.69/x
  3. Step 3: Cross multiply
    641,920.76x = 885,839.81 × 355,434.69
  4. Step 4: Simplify right side
    641,920.76x = 314,858,199,145.60
  5. Step 5: Solve for x
    x = 314,858,199,145.60/641,920.76
  6. Step 6: Final answer
    x = 490,493.88

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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.