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Finding the Fourth Proportional to 664,808.20, 997,536.30 and 309,639.40

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Solution

The fourth proportional to 664,808.20, 997,536.30 and 309,639.40 is: 464,610.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,808.20 : 997,536.30 = 309,639.40 : x
  2. Step 2: Convert to fraction form
    664,808.20/997,536.30 = 309,639.40/x
  3. Step 3: Cross multiply
    664,808.20x = 997,536.30 × 309,639.40
  4. Step 4: Simplify right side
    664,808.20x = 308,876,541,410.22
  5. Step 5: Solve for x
    x = 308,876,541,410.22/664,808.20
  6. Step 6: Final answer
    x = 464,610.01

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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.