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Finding the Fourth Proportional to 290,779.19, 436,168.24 and 91,114.87

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Solution

The fourth proportional to 290,779.19, 436,168.24 and 91,114.87 is: 136,672.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,779.19 : 436,168.24 = 91,114.87 : x
  2. Step 2: Convert to fraction form
    290,779.19/436,168.24 = 91,114.87/x
  3. Step 3: Cross multiply
    290,779.19x = 436,168.24 × 91,114.87
  4. Step 4: Simplify right side
    290,779.19x = 39,741,409,849.31
  5. Step 5: Solve for x
    x = 39,741,409,849.31/290,779.19
  6. Step 6: Final answer
    x = 136,672.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.