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Finding the Fourth Proportional to 628,019.65, 866,648.59 and 356,112.37

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Solution

The fourth proportional to 628,019.65, 866,648.59 and 356,112.37 is: 491,424.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,019.65 : 866,648.59 = 356,112.37 : x
  2. Step 2: Convert to fraction form
    628,019.65/866,648.59 = 356,112.37/x
  3. Step 3: Cross multiply
    628,019.65x = 866,648.59 × 356,112.37
  4. Step 4: Simplify right side
    628,019.65x = 308,624,283,342.06
  5. Step 5: Solve for x
    x = 308,624,283,342.06/628,019.65
  6. Step 6: Final answer
    x = 491,424.57

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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.