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Finding the Fourth Proportional to 628,533.31, 867,395.64 and 356,612.65

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Solution

The fourth proportional to 628,533.31, 867,395.64 and 356,612.65 is: 492,136.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,533.31 : 867,395.64 = 356,612.65 : x
  2. Step 2: Convert to fraction form
    628,533.31/867,395.64 = 356,612.65/x
  3. Step 3: Cross multiply
    628,533.31x = 867,395.64 × 356,612.65
  4. Step 4: Simplify right side
    628,533.31x = 309,324,257,778.85
  5. Step 5: Solve for x
    x = 309,324,257,778.85/628,533.31
  6. Step 6: Final answer
    x = 492,136.62

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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.