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Finding the Fourth Proportional to 679,636, 937,898.76 and 377,830

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Solution

The fourth proportional to 679,636, 937,898.76 and 377,830 is: 521,406.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,636 : 937,898.76 = 377,830 : x
  2. Step 2: Convert to fraction form
    679,636/937,898.76 = 377,830/x
  3. Step 3: Cross multiply
    679,636x = 937,898.76 × 377,830
  4. Step 4: Simplify right side
    679,636x = 354,366,288,490.80
  5. Step 5: Solve for x
    x = 354,366,288,490.80/679,636
  6. Step 6: Final answer
    x = 521,406.00

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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.