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Finding the Fourth Proportional to 657,825.21, 907,813.71 and 386,089.11

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Solution

The fourth proportional to 657,825.21, 907,813.71 and 386,089.11 is: 532,811.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,825.21 : 907,813.71 = 386,089.11 : x
  2. Step 2: Convert to fraction form
    657,825.21/907,813.71 = 386,089.11/x
  3. Step 3: Cross multiply
    657,825.21x = 907,813.71 × 386,089.11
  4. Step 4: Simplify right side
    657,825.21x = 350,496,987,339.70
  5. Step 5: Solve for x
    x = 350,496,987,339.70/657,825.21
  6. Step 6: Final answer
    x = 532,811.73

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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.