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Finding the Fourth Proportional to 390,574.44, 538,991.46 and 211,726.44

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Solution

The fourth proportional to 390,574.44, 538,991.46 and 211,726.44 is: 292,181.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,574.44 : 538,991.46 = 211,726.44 : x
  2. Step 2: Convert to fraction form
    390,574.44/538,991.46 = 211,726.44/x
  3. Step 3: Cross multiply
    390,574.44x = 538,991.46 × 211,726.44
  4. Step 4: Simplify right side
    390,574.44x = 114,118,743,016.20
  5. Step 5: Solve for x
    x = 114,118,743,016.20/390,574.44
  6. Step 6: Final answer
    x = 292,181.80

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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.