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Finding the Fourth Proportional to 670,971.30, 925,587.50 and 398,845.64

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Solution

The fourth proportional to 670,971.30, 925,587.50 and 398,845.64 is: 550,197.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,971.30 : 925,587.50 = 398,845.64 : x
  2. Step 2: Convert to fraction form
    670,971.30/925,587.50 = 398,845.64/x
  3. Step 3: Cross multiply
    670,971.30x = 925,587.50 × 398,845.64
  4. Step 4: Simplify right side
    670,971.30x = 369,166,532,191.33
  5. Step 5: Solve for x
    x = 369,166,532,191.33/670,971.30
  6. Step 6: Final answer
    x = 550,197.20

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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.