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Finding the Fourth Proportional to 312,779.45, 431,636.37 and 169,538.85

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Solution

The fourth proportional to 312,779.45, 431,636.37 and 169,538.85 is: 233,964.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,779.45 : 431,636.37 = 169,538.85 : x
  2. Step 2: Convert to fraction form
    312,779.45/431,636.37 = 169,538.85/x
  3. Step 3: Cross multiply
    312,779.45x = 431,636.37 × 169,538.85
  4. Step 4: Simplify right side
    312,779.45x = 73,179,133,787.97
  5. Step 5: Solve for x
    x = 73,179,133,787.97/312,779.45
  6. Step 6: Final answer
    x = 233,964.01

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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.