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Finding the Fourth Proportional to 640,025.80, 883,243.02 and 353,539.96

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Solution

The fourth proportional to 640,025.80, 883,243.02 and 353,539.96 is: 487,889.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,025.80 : 883,243.02 = 353,539.96 : x
  2. Step 2: Convert to fraction form
    640,025.80/883,243.02 = 353,539.96/x
  3. Step 3: Cross multiply
    640,025.80x = 883,243.02 × 353,539.96
  4. Step 4: Simplify right side
    640,025.80x = 312,261,701,961.08
  5. Step 5: Solve for x
    x = 312,261,701,961.08/640,025.80
  6. Step 6: Final answer
    x = 487,889.24

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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.