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Finding the Fourth Proportional to 671,022, 925,705.23 and 398,935.51

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Solution

The fourth proportional to 671,022, 925,705.23 and 398,935.51 is: 550,349.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,022 : 925,705.23 = 398,935.51 : x
  2. Step 2: Convert to fraction form
    671,022/925,705.23 = 398,935.51/x
  3. Step 3: Cross multiply
    671,022x = 925,705.23 × 398,935.51
  4. Step 4: Simplify right side
    671,022x = 369,296,685,725.45
  5. Step 5: Solve for x
    x = 369,296,685,725.45/671,022
  6. Step 6: Final answer
    x = 550,349.59

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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.