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Finding the Fourth Proportional to 438,612.63, 657,942.44 and 139,115.94

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Solution

The fourth proportional to 438,612.63, 657,942.44 and 139,115.94 is: 208,681.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,612.63 : 657,942.44 = 139,115.94 : x
  2. Step 2: Convert to fraction form
    438,612.63/657,942.44 = 139,115.94/x
  3. Step 3: Cross multiply
    438,612.63x = 657,942.44 × 139,115.94
  4. Step 4: Simplify right side
    438,612.63x = 91,530,280,310.91
  5. Step 5: Solve for x
    x = 91,530,280,310.91/438,612.63
  6. Step 6: Final answer
    x = 208,681.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.