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Finding the Fourth Proportional to 489,464.40, 734,464.20 and 189,956.88

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Solution

The fourth proportional to 489,464.40, 734,464.20 and 189,956.88 is: 285,039.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,464.40 : 734,464.20 = 189,956.88 : x
  2. Step 2: Convert to fraction form
    489,464.40/734,464.20 = 189,956.88/x
  3. Step 3: Cross multiply
    489,464.40x = 734,464.20 × 189,956.88
  4. Step 4: Simplify right side
    489,464.40x = 139,516,527,903.70
  5. Step 5: Solve for x
    x = 139,516,527,903.70/489,464.40
  6. Step 6: Final answer
    x = 285,039.17

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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.