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Finding the Fourth Proportional to 628,761.89, 867,811 and 356,855.24

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Solution

The fourth proportional to 628,761.89, 867,811 and 356,855.24 is: 492,528.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,761.89 : 867,811 = 356,855.24 : x
  2. Step 2: Convert to fraction form
    628,761.89/867,811 = 356,855.24/x
  3. Step 3: Cross multiply
    628,761.89x = 867,811 × 356,855.24
  4. Step 4: Simplify right side
    628,761.89x = 309,682,902,679.64
  5. Step 5: Solve for x
    x = 309,682,902,679.64/628,761.89
  6. Step 6: Final answer
    x = 492,528.11

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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.