Home / 742,980.31-1,025,293.06-420,721

Finding the Fourth Proportional to 742,980.31, 1,025,293.06 and 420,721

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Solution

The fourth proportional to 742,980.31, 1,025,293.06 and 420,721 is: 580,583.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,980.31 : 1,025,293.06 = 420,721 : x
  2. Step 2: Convert to fraction form
    742,980.31/1,025,293.06 = 420,721/x
  3. Step 3: Cross multiply
    742,980.31x = 1,025,293.06 × 420,721
  4. Step 4: Simplify right side
    742,980.31x = 431,362,321,496.26
  5. Step 5: Solve for x
    x = 431,362,321,496.26/742,980.31
  6. Step 6: Final answer
    x = 580,583.79

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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.