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Finding the Fourth Proportional to 641,628, 885,680.28 and 373,356

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Solution

The fourth proportional to 641,628, 885,680.28 and 373,356 is: 515,367.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,628 : 885,680.28 = 373,356 : x
  2. Step 2: Convert to fraction form
    641,628/885,680.28 = 373,356/x
  3. Step 3: Cross multiply
    641,628x = 885,680.28 × 373,356
  4. Step 4: Simplify right side
    641,628x = 330,674,046,619.68
  5. Step 5: Solve for x
    x = 330,674,046,619.68/641,628
  6. Step 6: Final answer
    x = 515,367.23

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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.