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Finding the Fourth Proportional to 395,396.60, 545,656.47 and 225,646.52

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Solution

The fourth proportional to 395,396.60, 545,656.47 and 225,646.52 is: 311,397.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,396.60 : 545,656.47 = 225,646.52 : x
  2. Step 2: Convert to fraction form
    395,396.60/545,656.47 = 225,646.52/x
  3. Step 3: Cross multiply
    395,396.60x = 545,656.47 × 225,646.52
  4. Step 4: Simplify right side
    395,396.60x = 123,125,483,570.98
  5. Step 5: Solve for x
    x = 123,125,483,570.98/395,396.60
  6. Step 6: Final answer
    x = 311,397.43

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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.