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Finding the Fourth Proportional to 257,583.40, 386,375.10 and 70,613.80

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Solution

The fourth proportional to 257,583.40, 386,375.10 and 70,613.80 is: 105,920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,583.40 : 386,375.10 = 70,613.80 : x
  2. Step 2: Convert to fraction form
    257,583.40/386,375.10 = 70,613.80/x
  3. Step 3: Cross multiply
    257,583.40x = 386,375.10 × 70,613.80
  4. Step 4: Simplify right side
    257,583.40x = 27,283,414,036.38
  5. Step 5: Solve for x
    x = 27,283,414,036.38/257,583.40
  6. Step 6: Final answer
    x = 105,920.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.