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Finding the Fourth Proportional to 640,760.64, 884,459.52 and 449,820.96

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Solution

The fourth proportional to 640,760.64, 884,459.52 and 449,820.96 is: 620,900.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,760.64 : 884,459.52 = 449,820.96 : x
  2. Step 2: Convert to fraction form
    640,760.64/884,459.52 = 449,820.96/x
  3. Step 3: Cross multiply
    640,760.64x = 884,459.52 × 449,820.96
  4. Step 4: Simplify right side
    640,760.64x = 397,848,430,367.54
  5. Step 5: Solve for x
    x = 397,848,430,367.54/640,760.64
  6. Step 6: Final answer
    x = 620,900.23

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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.