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Finding the Fourth Proportional to 621,639.71, 857,793.24 and 349,701.96

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Solution

The fourth proportional to 621,639.71, 857,793.24 and 349,701.96 is: 482,549.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,639.71 : 857,793.24 = 349,701.96 : x
  2. Step 2: Convert to fraction form
    621,639.71/857,793.24 = 349,701.96/x
  3. Step 3: Cross multiply
    621,639.71x = 857,793.24 × 349,701.96
  4. Step 4: Simplify right side
    621,639.71x = 299,971,975,694.39
  5. Step 5: Solve for x
    x = 299,971,975,694.39/621,639.71
  6. Step 6: Final answer
    x = 482,549.57

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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.