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Finding the Fourth Proportional to 290,900.64, 436,360.72 and 80,520.96

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Solution

The fourth proportional to 290,900.64, 436,360.72 and 80,520.96 is: 120,784.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,900.64 : 436,360.72 = 80,520.96 : x
  2. Step 2: Convert to fraction form
    290,900.64/436,360.72 = 80,520.96/x
  3. Step 3: Cross multiply
    290,900.64x = 436,360.72 × 80,520.96
  4. Step 4: Simplify right side
    290,900.64x = 35,136,184,080.69
  5. Step 5: Solve for x
    x = 35,136,184,080.69/290,900.64
  6. Step 6: Final answer
    x = 120,784.14

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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.