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Finding the Fourth Proportional to 494,994.40, 741,179.40 and 390,018.40

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Solution

The fourth proportional to 494,994.40, 741,179.40 and 390,018.40 is: 583,993.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,994.40 : 741,179.40 = 390,018.40 : x
  2. Step 2: Convert to fraction form
    494,994.40/741,179.40 = 390,018.40/x
  3. Step 3: Cross multiply
    494,994.40x = 741,179.40 × 390,018.40
  4. Step 4: Simplify right side
    494,994.40x = 289,073,603,700.96
  5. Step 5: Solve for x
    x = 289,073,603,700.96/494,994.40
  6. Step 6: Final answer
    x = 583,993.68

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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.