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Finding the Fourth Proportional to 624,682.96, 861,710.70 and 395,169.64

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Solution

The fourth proportional to 624,682.96, 861,710.70 and 395,169.64 is: 545,111.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,682.96 : 861,710.70 = 395,169.64 : x
  2. Step 2: Convert to fraction form
    624,682.96/861,710.70 = 395,169.64/x
  3. Step 3: Cross multiply
    624,682.96x = 861,710.70 × 395,169.64
  4. Step 4: Simplify right side
    624,682.96x = 340,521,907,103.15
  5. Step 5: Solve for x
    x = 340,521,907,103.15/624,682.96
  6. Step 6: Final answer
    x = 545,111.57

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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.