Home / 742,887.78-1,025,174.61-420,589.50

Finding the Fourth Proportional to 742,887.78, 1,025,174.61 and 420,589.50

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Solution

The fourth proportional to 742,887.78, 1,025,174.61 and 420,589.50 is: 580,407.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,887.78 : 1,025,174.61 = 420,589.50 : x
  2. Step 2: Convert to fraction form
    742,887.78/1,025,174.61 = 420,589.50/x
  3. Step 3: Cross multiply
    742,887.78x = 1,025,174.61 × 420,589.50
  4. Step 4: Simplify right side
    742,887.78x = 431,177,676,632.60
  5. Step 5: Solve for x
    x = 431,177,676,632.60/742,887.78
  6. Step 6: Final answer
    x = 580,407.55

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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.