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Finding the Fourth Proportional to 626,480.70, 864,543.36 and 340,000.78

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Solution

The fourth proportional to 626,480.70, 864,543.36 and 340,000.78 is: 469,201.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,480.70 : 864,543.36 = 340,000.78 : x
  2. Step 2: Convert to fraction form
    626,480.70/864,543.36 = 340,000.78/x
  3. Step 3: Cross multiply
    626,480.70x = 864,543.36 × 340,000.78
  4. Step 4: Simplify right side
    626,480.70x = 293,945,416,743.82
  5. Step 5: Solve for x
    x = 293,945,416,743.82/626,480.70
  6. Step 6: Final answer
    x = 469,201.07

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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.