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Finding the Fourth Proportional to 640,696.77, 884,126.21 and 354,199.77

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Solution

The fourth proportional to 640,696.77, 884,126.21 and 354,199.77 is: 488,776.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,696.77 : 884,126.21 = 354,199.77 : x
  2. Step 2: Convert to fraction form
    640,696.77/884,126.21 = 354,199.77/x
  3. Step 3: Cross multiply
    640,696.77x = 884,126.21 × 354,199.77
  4. Step 4: Simplify right side
    640,696.77x = 313,157,298,461.97
  5. Step 5: Solve for x
    x = 313,157,298,461.97/640,696.77
  6. Step 6: Final answer
    x = 488,776.15

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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.