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Finding the Fourth Proportional to 290,707.32, 436,056.66 and 80,340.60

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Solution

The fourth proportional to 290,707.32, 436,056.66 and 80,340.60 is: 120,509.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,707.32 : 436,056.66 = 80,340.60 : x
  2. Step 2: Convert to fraction form
    290,707.32/436,056.66 = 80,340.60/x
  3. Step 3: Cross multiply
    290,707.32x = 436,056.66 × 80,340.60
  4. Step 4: Simplify right side
    290,707.32x = 35,033,053,698.40
  5. Step 5: Solve for x
    x = 35,033,053,698.40/290,707.32
  6. Step 6: Final answer
    x = 120,509.71

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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.