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Finding the Fourth Proportional to 640,076.10, 883,292.31 and 353,593.50

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Solution

The fourth proportional to 640,076.10, 883,292.31 and 353,593.50 is: 487,952.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,076.10 : 883,292.31 = 353,593.50 : x
  2. Step 2: Convert to fraction form
    640,076.10/883,292.31 = 353,593.50/x
  3. Step 3: Cross multiply
    640,076.10x = 883,292.31 × 353,593.50
  4. Step 4: Simplify right side
    640,076.10x = 312,326,419,415.99
  5. Step 5: Solve for x
    x = 312,326,419,415.99/640,076.10
  6. Step 6: Final answer
    x = 487,952.01

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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.