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Finding the Fourth Proportional to 395,071.10, 545,194.32 and 213,779.06

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Solution

The fourth proportional to 395,071.10, 545,194.32 and 213,779.06 is: 295,013.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,071.10 : 545,194.32 = 213,779.06 : x
  2. Step 2: Convert to fraction form
    395,071.10/545,194.32 = 213,779.06/x
  3. Step 3: Cross multiply
    395,071.10x = 545,194.32 × 213,779.06
  4. Step 4: Simplify right side
    395,071.10x = 116,551,129,246.94
  5. Step 5: Solve for x
    x = 116,551,129,246.94/395,071.10
  6. Step 6: Final answer
    x = 295,013.05

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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.