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Finding the Fourth Proportional to 769,395.40, 1,062,062 and 688,680.52

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Solution

The fourth proportional to 769,395.40, 1,062,062 and 688,680.52 is: 950,644.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,395.40 : 1,062,062 = 688,680.52 : x
  2. Step 2: Convert to fraction form
    769,395.40/1,062,062 = 688,680.52/x
  3. Step 3: Cross multiply
    769,395.40x = 1,062,062 × 688,680.52
  4. Step 4: Simplify right side
    769,395.40x = 731,421,410,432.24
  5. Step 5: Solve for x
    x = 731,421,410,432.24/769,395.40
  6. Step 6: Final answer
    x = 950,644.38

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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.