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Finding the Fourth Proportional to 621,513.64, 857,684.04 and 353,241.64

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Solution

The fourth proportional to 621,513.64, 857,684.04 and 353,241.64 is: 487,470.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,513.64 : 857,684.04 = 353,241.64 : x
  2. Step 2: Convert to fraction form
    621,513.64/857,684.04 = 353,241.64/x
  3. Step 3: Cross multiply
    621,513.64x = 857,684.04 × 353,241.64
  4. Step 4: Simplify right side
    621,513.64x = 302,969,716,891.43
  5. Step 5: Solve for x
    x = 302,969,716,891.43/621,513.64
  6. Step 6: Final answer
    x = 487,470.74

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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.