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Finding the Fourth Proportional to 691,611.75, 954,599.18 and 389,980.71

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Solution

The fourth proportional to 691,611.75, 954,599.18 and 389,980.71 is: 538,272.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,611.75 : 954,599.18 = 389,980.71 : x
  2. Step 2: Convert to fraction form
    691,611.75/954,599.18 = 389,980.71/x
  3. Step 3: Cross multiply
    691,611.75x = 954,599.18 × 389,980.71
  4. Step 4: Simplify right side
    691,611.75x = 372,275,264,031.91
  5. Step 5: Solve for x
    x = 372,275,264,031.91/691,611.75
  6. Step 6: Final answer
    x = 538,272.03

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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.