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Finding the Fourth Proportional to 643,776.76, 888,007.74 and 414,631

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Solution

The fourth proportional to 643,776.76, 888,007.74 and 414,631 is: 571,930.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,776.76 : 888,007.74 = 414,631 : x
  2. Step 2: Convert to fraction form
    643,776.76/888,007.74 = 414,631/x
  3. Step 3: Cross multiply
    643,776.76x = 888,007.74 × 414,631
  4. Step 4: Simplify right side
    643,776.76x = 368,195,537,243.94
  5. Step 5: Solve for x
    x = 368,195,537,243.94/643,776.76
  6. Step 6: Final answer
    x = 571,930.46

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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.