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Finding the Fourth Proportional to 687,563.03, 948,818.76 and 381,638.54

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Solution

The fourth proportional to 687,563.03, 948,818.76 and 381,638.54 is: 526,651.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,563.03 : 948,818.76 = 381,638.54 : x
  2. Step 2: Convert to fraction form
    687,563.03/948,818.76 = 381,638.54/x
  3. Step 3: Cross multiply
    687,563.03x = 948,818.76 × 381,638.54
  4. Step 4: Simplify right side
    687,563.03x = 362,105,806,291.01
  5. Step 5: Solve for x
    x = 362,105,806,291.01/687,563.03
  6. Step 6: Final answer
    x = 526,651.07

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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.