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Finding the Fourth Proportional to 626,139.36, 864,065.64 and 339,657

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Solution

The fourth proportional to 626,139.36, 864,065.64 and 339,657 is: 468,723.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,139.36 : 864,065.64 = 339,657 : x
  2. Step 2: Convert to fraction form
    626,139.36/864,065.64 = 339,657/x
  3. Step 3: Cross multiply
    626,139.36x = 864,065.64 × 339,657
  4. Step 4: Simplify right side
    626,139.36x = 293,485,943,085.48
  5. Step 5: Solve for x
    x = 293,485,943,085.48/626,139.36
  6. Step 6: Final answer
    x = 468,723.04

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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.