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Finding the Fourth Proportional to 303,990.72, 456,078.36 and 215,415.60

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Solution

The fourth proportional to 303,990.72, 456,078.36 and 215,415.60 is: 323,188.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,990.72 : 456,078.36 = 215,415.60 : x
  2. Step 2: Convert to fraction form
    303,990.72/456,078.36 = 215,415.60/x
  3. Step 3: Cross multiply
    303,990.72x = 456,078.36 × 215,415.60
  4. Step 4: Simplify right side
    303,990.72x = 98,246,393,566.42
  5. Step 5: Solve for x
    x = 98,246,393,566.42/303,990.72
  6. Step 6: Final answer
    x = 323,188.79

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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.