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Finding the Fourth Proportional to 620,759.09, 856,662.78 and 348,810.71

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Solution

The fourth proportional to 620,759.09, 856,662.78 and 348,810.71 is: 481,367.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,759.09 : 856,662.78 = 348,810.71 : x
  2. Step 2: Convert to fraction form
    620,759.09/856,662.78 = 348,810.71/x
  3. Step 3: Cross multiply
    620,759.09x = 856,662.78 × 348,810.71
  4. Step 4: Simplify right side
    620,759.09x = 298,813,149,547.10
  5. Step 5: Solve for x
    x = 298,813,149,547.10/620,759.09
  6. Step 6: Final answer
    x = 481,367.33

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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.