Home / 642,485.44-886,631.52-356,003.20

Finding the Fourth Proportional to 642,485.44, 886,631.52 and 356,003.20

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Solution

The fourth proportional to 642,485.44, 886,631.52 and 356,003.20 is: 491,285.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,485.44 : 886,631.52 = 356,003.20 : x
  2. Step 2: Convert to fraction form
    642,485.44/886,631.52 = 356,003.20/x
  3. Step 3: Cross multiply
    642,485.44x = 886,631.52 × 356,003.20
  4. Step 4: Simplify right side
    642,485.44x = 315,643,658,340.86
  5. Step 5: Solve for x
    x = 315,643,658,340.86/642,485.44
  6. Step 6: Final answer
    x = 491,285.31

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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.