Home / 641,920.84-885,839.22-355,440.04

Finding the Fourth Proportional to 641,920.84, 885,839.22 and 355,440.04

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Solution

The fourth proportional to 641,920.84, 885,839.22 and 355,440.04 is: 490,500.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,920.84 : 885,839.22 = 355,440.04 : x
  2. Step 2: Convert to fraction form
    641,920.84/885,839.22 = 355,440.04/x
  3. Step 3: Cross multiply
    641,920.84x = 885,839.22 × 355,440.04
  4. Step 4: Simplify right side
    641,920.84x = 314,862,727,790.37
  5. Step 5: Solve for x
    x = 314,862,727,790.37/641,920.84
  6. Step 6: Final answer
    x = 490,500.87

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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.