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Finding the Fourth Proportional to 290,705.32, 436,053.66 and 80,338.60

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Solution

The fourth proportional to 290,705.32, 436,053.66 and 80,338.60 is: 120,506.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,705.32 : 436,053.66 = 80,338.60 : x
  2. Step 2: Convert to fraction form
    290,705.32/436,053.66 = 80,338.60/x
  3. Step 3: Cross multiply
    290,705.32x = 436,053.66 × 80,338.60
  4. Step 4: Simplify right side
    290,705.32x = 35,031,940,569.28
  5. Step 5: Solve for x
    x = 35,031,940,569.28/290,705.32
  6. Step 6: Final answer
    x = 120,506.71

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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.