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Finding the Fourth Proportional to 290,886.64, 436,330.56 and 80,525.20

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Solution

The fourth proportional to 290,886.64, 436,330.56 and 80,525.20 is: 120,787.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,886.64 : 436,330.56 = 80,525.20 : x
  2. Step 2: Convert to fraction form
    290,886.64/436,330.56 = 80,525.20/x
  3. Step 3: Cross multiply
    290,886.64x = 436,330.56 × 80,525.20
  4. Step 4: Simplify right side
    290,886.64x = 35,135,605,610.11
  5. Step 5: Solve for x
    x = 35,135,605,610.11/290,886.64
  6. Step 6: Final answer
    x = 120,787.97

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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.