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Finding the Fourth Proportional to 878,687.01, 1,317,556.53 and 398,652.84

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Solution

The fourth proportional to 878,687.01, 1,317,556.53 and 398,652.84 is: 597,764.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,687.01 : 1,317,556.53 = 398,652.84 : x
  2. Step 2: Convert to fraction form
    878,687.01/1,317,556.53 = 398,652.84/x
  3. Step 3: Cross multiply
    878,687.01x = 1,317,556.53 × 398,652.84
  4. Step 4: Simplify right side
    878,687.01x = 525,247,652,545.05
  5. Step 5: Solve for x
    x = 525,247,652,545.05/878,687.01
  6. Step 6: Final answer
    x = 597,764.22

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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.