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Finding the Fourth Proportional to 490,389.57, 677,039.52 and 388,825.29

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Solution

The fourth proportional to 490,389.57, 677,039.52 and 388,825.29 is: 536,818.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,389.57 : 677,039.52 = 388,825.29 : x
  2. Step 2: Convert to fraction form
    490,389.57/677,039.52 = 388,825.29/x
  3. Step 3: Cross multiply
    490,389.57x = 677,039.52 × 388,825.29
  4. Step 4: Simplify right side
    490,389.57x = 263,250,087,705.46
  5. Step 5: Solve for x
    x = 263,250,087,705.46/490,389.57
  6. Step 6: Final answer
    x = 536,818.28

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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.