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Finding the Fourth Proportional to 621,710.28, 857,958.66 and 349,778.34

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Solution

The fourth proportional to 621,710.28, 857,958.66 and 349,778.34 is: 482,693.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,710.28 : 857,958.66 = 349,778.34 : x
  2. Step 2: Convert to fraction form
    621,710.28/857,958.66 = 349,778.34/x
  3. Step 3: Cross multiply
    621,710.28x = 857,958.66 × 349,778.34
  4. Step 4: Simplify right side
    621,710.28x = 300,095,355,883.42
  5. Step 5: Solve for x
    x = 300,095,355,883.42/621,710.28
  6. Step 6: Final answer
    x = 482,693.25

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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.