Home / 688,961.28-950,766.96-398,613.60

Finding the Fourth Proportional to 688,961.28, 950,766.96 and 398,613.60

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Solution

The fourth proportional to 688,961.28, 950,766.96 and 398,613.60 is: 550,087.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,961.28 : 950,766.96 = 398,613.60 : x
  2. Step 2: Convert to fraction form
    688,961.28/950,766.96 = 398,613.60/x
  3. Step 3: Cross multiply
    688,961.28x = 950,766.96 × 398,613.60
  4. Step 4: Simplify right side
    688,961.28x = 378,988,640,686.66
  5. Step 5: Solve for x
    x = 378,988,640,686.66/688,961.28
  6. Step 6: Final answer
    x = 550,087.00

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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.