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Finding the Fourth Proportional to 622,782.34, 859,503.12 and 381,224.55

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Solution

The fourth proportional to 622,782.34, 859,503.12 and 381,224.55 is: 526,128.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,782.34 : 859,503.12 = 381,224.55 : x
  2. Step 2: Convert to fraction form
    622,782.34/859,503.12 = 381,224.55/x
  3. Step 3: Cross multiply
    622,782.34x = 859,503.12 × 381,224.55
  4. Step 4: Simplify right side
    622,782.34x = 327,663,690,145.60
  5. Step 5: Solve for x
    x = 327,663,690,145.60/622,782.34
  6. Step 6: Final answer
    x = 526,128.74

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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.