Home / 620,403.67-855,939.04-405,669.43

Finding the Fourth Proportional to 620,403.67, 855,939.04 and 405,669.43

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Solution

The fourth proportional to 620,403.67, 855,939.04 and 405,669.43 is: 559,681.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,403.67 : 855,939.04 = 405,669.43 : x
  2. Step 2: Convert to fraction form
    620,403.67/855,939.04 = 405,669.43/x
  3. Step 3: Cross multiply
    620,403.67x = 855,939.04 × 405,669.43
  4. Step 4: Simplify right side
    620,403.67x = 347,228,302,471.55
  5. Step 5: Solve for x
    x = 347,228,302,471.55/620,403.67
  6. Step 6: Final answer
    x = 559,681.25

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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.