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Finding the Fourth Proportional to 628,809, 867,706.60 and 356,876.88

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Solution

The fourth proportional to 628,809, 867,706.60 and 356,876.88 is: 492,461.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,809 : 867,706.60 = 356,876.88 : x
  2. Step 2: Convert to fraction form
    628,809/867,706.60 = 356,876.88/x
  3. Step 3: Cross multiply
    628,809x = 867,706.60 × 356,876.88
  4. Step 4: Simplify right side
    628,809x = 309,664,424,163.41
  5. Step 5: Solve for x
    x = 309,664,424,163.41/628,809
  6. Step 6: Final answer
    x = 492,461.82

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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.