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Finding the Fourth Proportional to 395,266.64, 545,468.13 and 213,978.56

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Solution

The fourth proportional to 395,266.64, 545,468.13 and 213,978.56 is: 295,290.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,266.64 : 545,468.13 = 213,978.56 : x
  2. Step 2: Convert to fraction form
    395,266.64/545,468.13 = 213,978.56/x
  3. Step 3: Cross multiply
    395,266.64x = 545,468.13 × 213,978.56
  4. Step 4: Simplify right side
    395,266.64x = 116,718,483,913.40
  5. Step 5: Solve for x
    x = 116,718,483,913.40/395,266.64
  6. Step 6: Final answer
    x = 295,290.50

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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.