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Finding the Fourth Proportional to 438,634.40, 656,396.40 and 298,666.40

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Solution

The fourth proportional to 438,634.40, 656,396.40 and 298,666.40 is: 446,940.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,634.40 : 656,396.40 = 298,666.40 : x
  2. Step 2: Convert to fraction form
    438,634.40/656,396.40 = 298,666.40/x
  3. Step 3: Cross multiply
    438,634.40x = 656,396.40 × 298,666.40
  4. Step 4: Simplify right side
    438,634.40x = 196,043,549,760.96
  5. Step 5: Solve for x
    x = 196,043,549,760.96/438,634.40
  6. Step 6: Final answer
    x = 446,940.66

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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.