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Finding the Fourth Proportional to 626,386.14, 864,415.20 and 339,906.30

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Solution

The fourth proportional to 626,386.14, 864,415.20 and 339,906.30 is: 469,071.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,386.14 : 864,415.20 = 339,906.30 : x
  2. Step 2: Convert to fraction form
    626,386.14/864,415.20 = 339,906.30/x
  3. Step 3: Cross multiply
    626,386.14x = 864,415.20 × 339,906.30
  4. Step 4: Simplify right side
    626,386.14x = 293,820,172,295.76
  5. Step 5: Solve for x
    x = 293,820,172,295.76/626,386.14
  6. Step 6: Final answer
    x = 469,071.96

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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.