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Finding the Fourth Proportional to 395,287.88, 545,496.60 and 213,999.74

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Solution

The fourth proportional to 395,287.88, 545,496.60 and 213,999.74 is: 295,319.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,287.88 : 545,496.60 = 213,999.74 : x
  2. Step 2: Convert to fraction form
    395,287.88/545,496.60 = 213,999.74/x
  3. Step 3: Cross multiply
    395,287.88x = 545,496.60 × 213,999.74
  4. Step 4: Simplify right side
    395,287.88x = 116,736,130,570.88
  5. Step 5: Solve for x
    x = 116,736,130,570.88/395,287.88
  6. Step 6: Final answer
    x = 295,319.28

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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.