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Finding the Fourth Proportional to 290,885.31, 436,335.39 and 80,525.07

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Solution

The fourth proportional to 290,885.31, 436,335.39 and 80,525.07 is: 120,789.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,885.31 : 436,335.39 = 80,525.07 : x
  2. Step 2: Convert to fraction form
    290,885.31/436,335.39 = 80,525.07/x
  3. Step 3: Cross multiply
    290,885.31x = 436,335.39 × 80,525.07
  4. Step 4: Simplify right side
    290,885.31x = 35,135,937,823.23
  5. Step 5: Solve for x
    x = 35,135,937,823.23/290,885.31
  6. Step 6: Final answer
    x = 120,789.66

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1.5x scale

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.