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Finding the Fourth Proportional to 640,806.59, 884,185.08 and 354,271.25

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Solution

The fourth proportional to 640,806.59, 884,185.08 and 354,271.25 is: 488,823.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,806.59 : 884,185.08 = 354,271.25 : x
  2. Step 2: Convert to fraction form
    640,806.59/884,185.08 = 354,271.25/x
  3. Step 3: Cross multiply
    640,806.59x = 884,185.08 × 354,271.25
  4. Step 4: Simplify right side
    640,806.59x = 313,241,353,522.95
  5. Step 5: Solve for x
    x = 313,241,353,522.95/640,806.59
  6. Step 6: Final answer
    x = 488,823.55

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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.