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Finding the Fourth Proportional to 689,469.55, 950,683.40 and 485,455.21

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Solution

The fourth proportional to 689,469.55, 950,683.40 and 485,455.21 is: 669,375.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,469.55 : 950,683.40 = 485,455.21 : x
  2. Step 2: Convert to fraction form
    689,469.55/950,683.40 = 485,455.21/x
  3. Step 3: Cross multiply
    689,469.55x = 950,683.40 × 485,455.21
  4. Step 4: Simplify right side
    689,469.55x = 461,514,207,163.24
  5. Step 5: Solve for x
    x = 461,514,207,163.24/689,469.55
  6. Step 6: Final answer
    x = 669,375.76

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1.5x scale

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.