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Finding the Fourth Proportional to 395,173.89, 545,341.41 and 213,888.20

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Solution

The fourth proportional to 395,173.89, 545,341.41 and 213,888.20 is: 295,166.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,173.89 : 545,341.41 = 213,888.20 : x
  2. Step 2: Convert to fraction form
    395,173.89/545,341.41 = 213,888.20/x
  3. Step 3: Cross multiply
    395,173.89x = 545,341.41 × 213,888.20
  4. Step 4: Simplify right side
    395,173.89x = 116,642,089,843.66
  5. Step 5: Solve for x
    x = 116,642,089,843.66/395,173.89
  6. Step 6: Final answer
    x = 295,166.49

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1.5x scale

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.