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Finding the Fourth Proportional to 379,653.42, 523,905.12 and 218,513.64

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Solution

The fourth proportional to 379,653.42, 523,905.12 and 218,513.64 is: 301,539.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,653.42 : 523,905.12 = 218,513.64 : x
  2. Step 2: Convert to fraction form
    379,653.42/523,905.12 = 218,513.64/x
  3. Step 3: Cross multiply
    379,653.42x = 523,905.12 × 218,513.64
  4. Step 4: Simplify right side
    379,653.42x = 114,480,414,785.84
  5. Step 5: Solve for x
    x = 114,480,414,785.84/379,653.42
  6. Step 6: Final answer
    x = 301,539.27

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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.