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Finding the Fourth Proportional to 395,071.60, 545,195.01 and 213,779.56

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Solution

The fourth proportional to 395,071.60, 545,195.01 and 213,779.56 is: 295,013.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,071.60 : 545,195.01 = 213,779.56 : x
  2. Step 2: Convert to fraction form
    395,071.60/545,195.01 = 213,779.56/x
  3. Step 3: Cross multiply
    395,071.60x = 545,195.01 × 213,779.56
  4. Step 4: Simplify right side
    395,071.60x = 116,551,549,352.00
  5. Step 5: Solve for x
    x = 116,551,549,352.00/395,071.60
  6. Step 6: Final answer
    x = 295,013.74

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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.