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Finding the Fourth Proportional to 628,144.64, 866,848 and 359,872

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Solution

The fourth proportional to 628,144.64, 866,848 and 359,872 is: 496,628.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,144.64 : 866,848 = 359,872 : x
  2. Step 2: Convert to fraction form
    628,144.64/866,848 = 359,872/x
  3. Step 3: Cross multiply
    628,144.64x = 866,848 × 359,872
  4. Step 4: Simplify right side
    628,144.64x = 311,954,323,456
  5. Step 5: Solve for x
    x = 311,954,323,456/628,144.64
  6. Step 6: Final answer
    x = 496,628.17

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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.