Home / 620,403.55-855,938.87-405,669.31

Finding the Fourth Proportional to 620,403.55, 855,938.87 and 405,669.31

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Solution

The fourth proportional to 620,403.55, 855,938.87 and 405,669.31 is: 559,681.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,403.55 : 855,938.87 = 405,669.31 : x
  2. Step 2: Convert to fraction form
    620,403.55/855,938.87 = 405,669.31/x
  3. Step 3: Cross multiply
    620,403.55x = 855,938.87 × 405,669.31
  4. Step 4: Simplify right side
    620,403.55x = 347,228,126,515.39
  5. Step 5: Solve for x
    x = 347,228,126,515.39/620,403.55
  6. Step 6: Final answer
    x = 559,681.08

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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.