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Finding the Fourth Proportional to 640,109.18, 883,348.44 and 368,164.28

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Solution

The fourth proportional to 640,109.18, 883,348.44 and 368,164.28 is: 508,065.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,109.18 : 883,348.44 = 368,164.28 : x
  2. Step 2: Convert to fraction form
    640,109.18/883,348.44 = 368,164.28/x
  3. Step 3: Cross multiply
    640,109.18x = 883,348.44 × 368,164.28
  4. Step 4: Simplify right side
    640,109.18x = 325,217,342,401.72
  5. Step 5: Solve for x
    x = 325,217,342,401.72/640,109.18
  6. Step 6: Final answer
    x = 508,065.42

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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.