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Finding the Fourth Proportional to 643,515.80, 965,273.70 and 616,213.40

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Solution

The fourth proportional to 643,515.80, 965,273.70 and 616,213.40 is: 924,320.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,515.80 : 965,273.70 = 616,213.40 : x
  2. Step 2: Convert to fraction form
    643,515.80/965,273.70 = 616,213.40/x
  3. Step 3: Cross multiply
    643,515.80x = 965,273.70 × 616,213.40
  4. Step 4: Simplify right side
    643,515.80x = 594,814,588,607.58
  5. Step 5: Solve for x
    x = 594,814,588,607.58/643,515.80
  6. Step 6: Final answer
    x = 924,320.10

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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.