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Finding the Fourth Proportional to 640,274.26, 883,628.90 and 364,643.84

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Solution

The fourth proportional to 640,274.26, 883,628.90 and 364,643.84 is: 503,237.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,274.26 : 883,628.90 = 364,643.84 : x
  2. Step 2: Convert to fraction form
    640,274.26/883,628.90 = 364,643.84/x
  3. Step 3: Cross multiply
    640,274.26x = 883,628.90 × 364,643.84
  4. Step 4: Simplify right side
    640,274.26x = 322,209,835,230.98
  5. Step 5: Solve for x
    x = 322,209,835,230.98/640,274.26
  6. Step 6: Final answer
    x = 503,237.21

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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.