Home / 641,683.28-885,512.16-355,197.20

Finding the Fourth Proportional to 641,683.28, 885,512.16 and 355,197.20

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Solution

The fourth proportional to 641,683.28, 885,512.16 and 355,197.20 is: 490,166.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,683.28 : 885,512.16 = 355,197.20 : x
  2. Step 2: Convert to fraction form
    641,683.28/885,512.16 = 355,197.20/x
  3. Step 3: Cross multiply
    641,683.28x = 885,512.16 × 355,197.20
  4. Step 4: Simplify right side
    641,683.28x = 314,531,439,797.95
  5. Step 5: Solve for x
    x = 314,531,439,797.95/641,683.28
  6. Step 6: Final answer
    x = 490,166.18

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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.