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Finding the Fourth Proportional to 636,111.92, 877,962.12 and 377,939.18

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Solution

The fourth proportional to 636,111.92, 877,962.12 and 377,939.18 is: 521,631.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,111.92 : 877,962.12 = 377,939.18 : x
  2. Step 2: Convert to fraction form
    636,111.92/877,962.12 = 377,939.18/x
  3. Step 3: Cross multiply
    636,111.92x = 877,962.12 × 377,939.18
  4. Step 4: Simplify right side
    636,111.92x = 331,816,283,703.86
  5. Step 5: Solve for x
    x = 331,816,283,703.86/636,111.92
  6. Step 6: Final answer
    x = 521,631.92

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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.