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Finding the Fourth Proportional to 628,812, 867,826.17 and 356,953.32

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Solution

The fourth proportional to 628,812, 867,826.17 and 356,953.32 is: 492,632.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,812 : 867,826.17 = 356,953.32 : x
  2. Step 2: Convert to fraction form
    628,812/867,826.17 = 356,953.32/x
  3. Step 3: Cross multiply
    628,812x = 867,826.17 × 356,953.32
  4. Step 4: Simplify right side
    628,812x = 309,773,432,564.38
  5. Step 5: Solve for x
    x = 309,773,432,564.38/628,812
  6. Step 6: Final answer
    x = 492,632.83

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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.