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Finding the Fourth Proportional to 679,737, 1,019,539.26 and 206,426.46

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Solution

The fourth proportional to 679,737, 1,019,539.26 and 206,426.46 is: 309,619.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,737 : 1,019,539.26 = 206,426.46 : x
  2. Step 2: Convert to fraction form
    679,737/1,019,539.26 = 206,426.46/x
  3. Step 3: Cross multiply
    679,737x = 1,019,539.26 × 206,426.46
  4. Step 4: Simplify right side
    679,737x = 210,459,880,272.82
  5. Step 5: Solve for x
    x = 210,459,880,272.82/679,737
  6. Step 6: Final answer
    x = 309,619.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.