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Finding the Fourth Proportional to 643,908.29, 888,576.99 and 353,518.43

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Solution

The fourth proportional to 643,908.29, 888,576.99 and 353,518.43 is: 487,846.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,908.29 : 888,576.99 = 353,518.43 : x
  2. Step 2: Convert to fraction form
    643,908.29/888,576.99 = 353,518.43/x
  3. Step 3: Cross multiply
    643,908.29x = 888,576.99 × 353,518.43
  4. Step 4: Simplify right side
    643,908.29x = 314,128,336,670.35
  5. Step 5: Solve for x
    x = 314,128,336,670.35/643,908.29
  6. Step 6: Final answer
    x = 487,846.40

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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.