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Finding the Fourth Proportional to 619,123.85, 854,028.98 and 389,317.31

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Solution

The fourth proportional to 619,123.85, 854,028.98 and 389,317.31 is: 537,030.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,123.85 : 854,028.98 = 389,317.31 : x
  2. Step 2: Convert to fraction form
    619,123.85/854,028.98 = 389,317.31/x
  3. Step 3: Cross multiply
    619,123.85x = 854,028.98 × 389,317.31
  4. Step 4: Simplify right side
    619,123.85x = 332,488,268,264.01
  5. Step 5: Solve for x
    x = 332,488,268,264.01/619,123.85
  6. Step 6: Final answer
    x = 537,030.30

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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.