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Finding the Fourth Proportional to 628,309.68, 866,919.96 and 356,318.16

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Solution

The fourth proportional to 628,309.68, 866,919.96 and 356,318.16 is: 491,635.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,309.68 : 866,919.96 = 356,318.16 : x
  2. Step 2: Convert to fraction form
    628,309.68/866,919.96 = 356,318.16/x
  3. Step 3: Cross multiply
    628,309.68x = 866,919.96 × 356,318.16
  4. Step 4: Simplify right side
    628,309.68x = 308,899,325,014.47
  5. Step 5: Solve for x
    x = 308,899,325,014.47/628,309.68
  6. Step 6: Final answer
    x = 491,635.47

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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.