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Finding the Fourth Proportional to 628,269.75, 866,946.65 and 356,250.69

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Solution

The fourth proportional to 628,269.75, 866,946.65 and 356,250.69 is: 491,588.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,269.75 : 866,946.65 = 356,250.69 : x
  2. Step 2: Convert to fraction form
    628,269.75/866,946.65 = 356,250.69/x
  3. Step 3: Cross multiply
    628,269.75x = 866,946.65 × 356,250.69
  4. Step 4: Simplify right side
    628,269.75x = 308,850,340,474.44
  5. Step 5: Solve for x
    x = 308,850,340,474.44/628,269.75
  6. Step 6: Final answer
    x = 491,588.75

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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.