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Finding the Fourth Proportional to 628,039.16, 866,675.48 and 356,131.88

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Solution

The fourth proportional to 628,039.16, 866,675.48 and 356,131.88 is: 491,451.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,039.16 : 866,675.48 = 356,131.88 : x
  2. Step 2: Convert to fraction form
    628,039.16/866,675.48 = 356,131.88/x
  3. Step 3: Cross multiply
    628,039.16x = 866,675.48 × 356,131.88
  4. Step 4: Simplify right side
    628,039.16x = 308,650,768,042.30
  5. Step 5: Solve for x
    x = 308,650,768,042.30/628,039.16
  6. Step 6: Final answer
    x = 491,451.47

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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.