Home / 745,412.89-1,028,665.42-405,880.33

Finding the Fourth Proportional to 745,412.89, 1,028,665.42 and 405,880.33

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Solution

The fourth proportional to 745,412.89, 1,028,665.42 and 405,880.33 is: 560,112.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,412.89 : 1,028,665.42 = 405,880.33 : x
  2. Step 2: Convert to fraction form
    745,412.89/1,028,665.42 = 405,880.33/x
  3. Step 3: Cross multiply
    745,412.89x = 1,028,665.42 × 405,880.33
  4. Step 4: Simplify right side
    745,412.89x = 417,515,060,129.19
  5. Step 5: Solve for x
    x = 417,515,060,129.19/745,412.89
  6. Step 6: Final answer
    x = 560,112.48

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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.