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Finding the Fourth Proportional to 638,775.40, 957,126.30 and 401,693.80

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Solution

The fourth proportional to 638,775.40, 957,126.30 and 401,693.80 is: 601,888.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,775.40 : 957,126.30 = 401,693.80 : x
  2. Step 2: Convert to fraction form
    638,775.40/957,126.30 = 401,693.80/x
  3. Step 3: Cross multiply
    638,775.40x = 957,126.30 × 401,693.80
  4. Step 4: Simplify right side
    638,775.40x = 384,471,700,526.94
  5. Step 5: Solve for x
    x = 384,471,700,526.94/638,775.40
  6. Step 6: Final answer
    x = 601,888.71

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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.