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Finding the Fourth Proportional to 664,169.20, 996,545.40 and 309,000.40

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Solution

The fourth proportional to 664,169.20, 996,545.40 and 309,000.40 is: 463,636.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,169.20 : 996,545.40 = 309,000.40 : x
  2. Step 2: Convert to fraction form
    664,169.20/996,545.40 = 309,000.40/x
  3. Step 3: Cross multiply
    664,169.20x = 996,545.40 × 309,000.40
  4. Step 4: Simplify right side
    664,169.20x = 307,932,927,218.16
  5. Step 5: Solve for x
    x = 307,932,927,218.16/664,169.20
  6. Step 6: Final answer
    x = 463,636.27

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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.