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Finding the Fourth Proportional to 642,238.88, 886,289.65 and 355,777.52

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Solution

The fourth proportional to 642,238.88, 886,289.65 and 355,777.52 is: 490,972.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,238.88 : 886,289.65 = 355,777.52 : x
  2. Step 2: Convert to fraction form
    642,238.88/886,289.65 = 355,777.52/x
  3. Step 3: Cross multiply
    642,238.88x = 886,289.65 × 355,777.52
  4. Step 4: Simplify right side
    642,238.88x = 315,321,928,357.78
  5. Step 5: Solve for x
    x = 315,321,928,357.78/642,238.88
  6. Step 6: Final answer
    x = 490,972.97

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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.