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Finding the Fourth Proportional to 831,774.60, 1,247,661.90 and 808,446.60

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Solution

The fourth proportional to 831,774.60, 1,247,661.90 and 808,446.60 is: 1,212,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,774.60 : 1,247,661.90 = 808,446.60 : x
  2. Step 2: Convert to fraction form
    831,774.60/1,247,661.90 = 808,446.60/x
  3. Step 3: Cross multiply
    831,774.60x = 1,247,661.90 × 808,446.60
  4. Step 4: Simplify right side
    831,774.60x = 1,008,668,021,004.54
  5. Step 5: Solve for x
    x = 1,008,668,021,004.54/831,774.60
  6. Step 6: Final answer
    x = 1,212,669.90

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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.