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Finding the Fourth Proportional to 628,803, 867,813.75 and 356,944.32

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Solution

The fourth proportional to 628,803, 867,813.75 and 356,944.32 is: 492,620.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,803 : 867,813.75 = 356,944.32 : x
  2. Step 2: Convert to fraction form
    628,803/867,813.75 = 356,944.32/x
  3. Step 3: Cross multiply
    628,803x = 867,813.75 × 356,944.32
  4. Step 4: Simplify right side
    628,803x = 309,761,188,880.40
  5. Step 5: Solve for x
    x = 309,761,188,880.40/628,803
  6. Step 6: Final answer
    x = 492,620.41

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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.