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Finding the Fourth Proportional to 290,933.56, 436,410.42 and 80,587

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Solution

The fourth proportional to 290,933.56, 436,410.42 and 80,587 is: 120,883.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,933.56 : 436,410.42 = 80,587 : x
  2. Step 2: Convert to fraction form
    290,933.56/436,410.42 = 80,587/x
  3. Step 3: Cross multiply
    290,933.56x = 436,410.42 × 80,587
  4. Step 4: Simplify right side
    290,933.56x = 35,169,006,516.54
  5. Step 5: Solve for x
    x = 35,169,006,516.54/290,933.56
  6. Step 6: Final answer
    x = 120,883.29

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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.