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Finding the Fourth Proportional to 689,608.80, 1,034,704.80 and 437,083.20

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Solution

The fourth proportional to 689,608.80, 1,034,704.80 and 437,083.20 is: 655,809.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,608.80 : 1,034,704.80 = 437,083.20 : x
  2. Step 2: Convert to fraction form
    689,608.80/1,034,704.80 = 437,083.20/x
  3. Step 3: Cross multiply
    689,608.80x = 1,034,704.80 × 437,083.20
  4. Step 4: Simplify right side
    689,608.80x = 452,252,085,039.36
  5. Step 5: Solve for x
    x = 452,252,085,039.36/689,608.80
  6. Step 6: Final answer
    x = 655,809.62

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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.