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Finding the Fourth Proportional to 641,629, 885,681.66 and 373,357

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Solution

The fourth proportional to 641,629, 885,681.66 and 373,357 is: 515,368.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,629 : 885,681.66 = 373,357 : x
  2. Step 2: Convert to fraction form
    641,629/885,681.66 = 373,357/x
  3. Step 3: Cross multiply
    641,629x = 885,681.66 × 373,357
  4. Step 4: Simplify right side
    641,629x = 330,675,447,532.62
  5. Step 5: Solve for x
    x = 330,675,447,532.62/641,629
  6. Step 6: Final answer
    x = 515,368.61

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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.