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Finding the Fourth Proportional to 290,575.64, 435,888.54 and 80,213.60

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Solution

The fourth proportional to 290,575.64, 435,888.54 and 80,213.60 is: 120,327.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,575.64 : 435,888.54 = 80,213.60 : x
  2. Step 2: Convert to fraction form
    290,575.64/435,888.54 = 80,213.60/x
  3. Step 3: Cross multiply
    290,575.64x = 435,888.54 × 80,213.60
  4. Step 4: Simplify right side
    290,575.64x = 34,964,188,992.14
  5. Step 5: Solve for x
    x = 34,964,188,992.14/290,575.64
  6. Step 6: Final answer
    x = 120,327.32

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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.