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Finding the Fourth Proportional to 691,630.40, 954,457.20 and 389,824.40

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Solution

The fourth proportional to 691,630.40, 954,457.20 and 389,824.40 is: 537,961.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,630.40 : 954,457.20 = 389,824.40 : x
  2. Step 2: Convert to fraction form
    691,630.40/954,457.20 = 389,824.40/x
  3. Step 3: Cross multiply
    691,630.40x = 954,457.20 × 389,824.40
  4. Step 4: Simplify right side
    691,630.40x = 372,070,705,315.68
  5. Step 5: Solve for x
    x = 372,070,705,315.68/691,630.40
  6. Step 6: Final answer
    x = 537,961.76

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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.