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Finding the Fourth Proportional to 368,971.55, 509,184.87 and 215,976.32

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Solution

The fourth proportional to 368,971.55, 509,184.87 and 215,976.32 is: 298,049.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,971.55 : 509,184.87 = 215,976.32 : x
  2. Step 2: Convert to fraction form
    368,971.55/509,184.87 = 215,976.32/x
  3. Step 3: Cross multiply
    368,971.55x = 509,184.87 × 215,976.32
  4. Step 4: Simplify right side
    368,971.55x = 109,971,874,422.28
  5. Step 5: Solve for x
    x = 109,971,874,422.28/368,971.55
  6. Step 6: Final answer
    x = 298,049.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.