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Finding the Fourth Proportional to 550,513.92, 759,529.84 and 321,019.36

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Solution

The fourth proportional to 550,513.92, 759,529.84 and 321,019.36 is: 442,902.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,513.92 : 759,529.84 = 321,019.36 : x
  2. Step 2: Convert to fraction form
    550,513.92/759,529.84 = 321,019.36/x
  3. Step 3: Cross multiply
    550,513.92x = 759,529.84 × 321,019.36
  4. Step 4: Simplify right side
    550,513.92x = 243,823,783,137.70
  5. Step 5: Solve for x
    x = 243,823,783,137.70/550,513.92
  6. Step 6: Final answer
    x = 442,902.12

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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.