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Finding the Fourth Proportional to 1,243,579.23, 1,865,368.85 and 345,021.12

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Solution

The fourth proportional to 1,243,579.23, 1,865,368.85 and 345,021.12 is: 517,531.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243,579.23 : 1,865,368.85 = 345,021.12 : x
  2. Step 2: Convert to fraction form
    1,243,579.23/1,865,368.85 = 345,021.12/x
  3. Step 3: Cross multiply
    1,243,579.23x = 1,865,368.85 × 345,021.12
  4. Step 4: Simplify right side
    1,243,579.23x = 643,591,648,115.01
  5. Step 5: Solve for x
    x = 643,591,648,115.01/1,243,579.23
  6. Step 6: Final answer
    x = 517,531.68

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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.