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Finding the Fourth Proportional to 290,685.02, 436,027.73 and 80,323.16

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Solution

The fourth proportional to 290,685.02, 436,027.73 and 80,323.16 is: 120,484.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,685.02 : 436,027.73 = 80,323.16 : x
  2. Step 2: Convert to fraction form
    290,685.02/436,027.73 = 80,323.16/x
  3. Step 3: Cross multiply
    290,685.02x = 436,027.73 × 80,323.16
  4. Step 4: Simplify right side
    290,685.02x = 35,023,125,121.23
  5. Step 5: Solve for x
    x = 35,023,125,121.23/290,685.02
  6. Step 6: Final answer
    x = 120,484.80

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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.