Home / 438,026.58-657,036-138,507.42

Finding the Fourth Proportional to 438,026.58, 657,036 and 138,507.42

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Solution

The fourth proportional to 438,026.58, 657,036 and 138,507.42 is: 207,759.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,026.58 : 657,036 = 138,507.42 : x
  2. Step 2: Convert to fraction form
    438,026.58/657,036 = 138,507.42/x
  3. Step 3: Cross multiply
    438,026.58x = 657,036 × 138,507.42
  4. Step 4: Simplify right side
    438,026.58x = 91,004,361,207.12
  5. Step 5: Solve for x
    x = 91,004,361,207.12/438,026.58
  6. Step 6: Final answer
    x = 207,759.91

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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.