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Finding the Fourth Proportional to 428,991.84, 591,980.40 and 237,998.88

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Solution

The fourth proportional to 428,991.84, 591,980.40 and 237,998.88 is: 328,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,991.84 : 591,980.40 = 237,998.88 : x
  2. Step 2: Convert to fraction form
    428,991.84/591,980.40 = 237,998.88/x
  3. Step 3: Cross multiply
    428,991.84x = 591,980.40 × 237,998.88
  4. Step 4: Simplify right side
    428,991.84x = 140,890,672,181.95
  5. Step 5: Solve for x
    x = 140,890,672,181.95/428,991.84
  6. Step 6: Final answer
    x = 328,422.73

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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.