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Finding the Fourth Proportional to 686,690.80, 1,029,744.60 and 331,813.60

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Solution

The fourth proportional to 686,690.80, 1,029,744.60 and 331,813.60 is: 497,579.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,690.80 : 1,029,744.60 = 331,813.60 : x
  2. Step 2: Convert to fraction form
    686,690.80/1,029,744.60 = 331,813.60/x
  3. Step 3: Cross multiply
    686,690.80x = 1,029,744.60 × 331,813.60
  4. Step 4: Simplify right side
    686,690.80x = 341,683,262,806.56
  5. Step 5: Solve for x
    x = 341,683,262,806.56/686,690.80
  6. Step 6: Final answer
    x = 497,579.50

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1.5x scale

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.