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Finding the Fourth Proportional to 381,673.88, 526,726.40 and 211,908

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Solution

The fourth proportional to 381,673.88, 526,726.40 and 211,908 is: 292,442.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,673.88 : 526,726.40 = 211,908 : x
  2. Step 2: Convert to fraction form
    381,673.88/526,726.40 = 211,908/x
  3. Step 3: Cross multiply
    381,673.88x = 526,726.40 × 211,908
  4. Step 4: Simplify right side
    381,673.88x = 111,617,537,971.20
  5. Step 5: Solve for x
    x = 111,617,537,971.20/381,673.88
  6. Step 6: Final answer
    x = 292,442.17

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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.