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Finding the Fourth Proportional to 776,292, 1,164,438 and 215,326.50

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Solution

The fourth proportional to 776,292, 1,164,438 and 215,326.50 is: 322,989.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,292 : 1,164,438 = 215,326.50 : x
  2. Step 2: Convert to fraction form
    776,292/1,164,438 = 215,326.50/x
  3. Step 3: Cross multiply
    776,292x = 1,164,438 × 215,326.50
  4. Step 4: Simplify right side
    776,292x = 250,734,359,007
  5. Step 5: Solve for x
    x = 250,734,359,007/776,292
  6. Step 6: Final answer
    x = 322,989.75

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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.