Home / 438,436.33-657,673.63-138,939.00

Finding the Fourth Proportional to 438,436.33, 657,673.63 and 138,939.00

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Solution

The fourth proportional to 438,436.33, 657,673.63 and 138,939.00 is: 208,414.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,436.33 : 657,673.63 = 138,939.00 : x
  2. Step 2: Convert to fraction form
    438,436.33/657,673.63 = 138,939.00/x
  3. Step 3: Cross multiply
    438,436.33x = 657,673.63 × 138,939.00
  4. Step 4: Simplify right side
    438,436.33x = 91,376,513,664.95
  5. Step 5: Solve for x
    x = 91,376,513,664.95/438,436.33
  6. Step 6: Final answer
    x = 208,414.56

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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.