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Finding the Fourth Proportional to 620,486.40, 929,745.45 and 409,878.30

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Solution

The fourth proportional to 620,486.40, 929,745.45 and 409,878.30 is: 614,167.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,486.40 : 929,745.45 = 409,878.30 : x
  2. Step 2: Convert to fraction form
    620,486.40/929,745.45 = 409,878.30/x
  3. Step 3: Cross multiply
    620,486.40x = 929,745.45 × 409,878.30
  4. Step 4: Simplify right side
    620,486.40x = 381,082,484,478.74
  5. Step 5: Solve for x
    x = 381,082,484,478.74/620,486.40
  6. Step 6: Final answer
    x = 614,167.34

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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.