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Finding the Fourth Proportional to 768,989.84, 1,151,876.28 and 618,414.80

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Solution

The fourth proportional to 768,989.84, 1,151,876.28 and 618,414.80 is: 926,328.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,989.84 : 1,151,876.28 = 618,414.80 : x
  2. Step 2: Convert to fraction form
    768,989.84/1,151,876.28 = 618,414.80/x
  3. Step 3: Cross multiply
    768,989.84x = 1,151,876.28 × 618,414.80
  4. Step 4: Simplify right side
    768,989.84x = 712,337,339,320.94
  5. Step 5: Solve for x
    x = 712,337,339,320.94/768,989.84
  6. Step 6: Final answer
    x = 926,328.67

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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.