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Finding the Fourth Proportional to 390,573.44, 538,990.08 and 211,725.44

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Solution

The fourth proportional to 390,573.44, 538,990.08 and 211,725.44 is: 292,180.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,573.44 : 538,990.08 = 211,725.44 : x
  2. Step 2: Convert to fraction form
    390,573.44/538,990.08 = 211,725.44/x
  3. Step 3: Cross multiply
    390,573.44x = 538,990.08 × 211,725.44
  4. Step 4: Simplify right side
    390,573.44x = 114,117,911,843.64
  5. Step 5: Solve for x
    x = 114,117,911,843.64/390,573.44
  6. Step 6: Final answer
    x = 292,180.42

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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.