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Finding the Fourth Proportional to 619,124.48, 854,029.85 and 389,317.94

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Solution

The fourth proportional to 619,124.48, 854,029.85 and 389,317.94 is: 537,031.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,124.48 : 854,029.85 = 389,317.94 : x
  2. Step 2: Convert to fraction form
    619,124.48/854,029.85 = 389,317.94/x
  3. Step 3: Cross multiply
    619,124.48x = 854,029.85 × 389,317.94
  4. Step 4: Simplify right side
    619,124.48x = 332,489,139,953.92
  5. Step 5: Solve for x
    x = 332,489,139,953.92/619,124.48
  6. Step 6: Final answer
    x = 537,031.16

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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.