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Finding the Fourth Proportional to 438,606.63, 657,933.44 and 139,109.94

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Solution

The fourth proportional to 438,606.63, 657,933.44 and 139,109.94 is: 208,672.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,606.63 : 657,933.44 = 139,109.94 : x
  2. Step 2: Convert to fraction form
    438,606.63/657,933.44 = 139,109.94/x
  3. Step 3: Cross multiply
    438,606.63x = 657,933.44 × 139,109.94
  4. Step 4: Simplify right side
    438,606.63x = 91,525,080,666.84
  5. Step 5: Solve for x
    x = 91,525,080,666.84/438,606.63
  6. Step 6: Final answer
    x = 208,672.36

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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.