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Finding the Fourth Proportional to 623,612.64, 860,564.52 and 394,293.36

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Solution

The fourth proportional to 623,612.64, 860,564.52 and 394,293.36 is: 544,111.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,612.64 : 860,564.52 = 394,293.36 : x
  2. Step 2: Convert to fraction form
    623,612.64/860,564.52 = 394,293.36/x
  3. Step 3: Cross multiply
    623,612.64x = 860,564.52 × 394,293.36
  4. Step 4: Simplify right side
    623,612.64x = 339,314,876,087.59
  5. Step 5: Solve for x
    x = 339,314,876,087.59/623,612.64
  6. Step 6: Final answer
    x = 544,111.61

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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.