Home / 438,427.16-657,659.88-138,929.81

Finding the Fourth Proportional to 438,427.16, 657,659.88 and 138,929.81

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Solution

The fourth proportional to 438,427.16, 657,659.88 and 138,929.81 is: 208,400.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,427.16 : 657,659.88 = 138,929.81 : x
  2. Step 2: Convert to fraction form
    438,427.16/657,659.88 = 138,929.81/x
  3. Step 3: Cross multiply
    438,427.16x = 657,659.88 × 138,929.81
  4. Step 4: Simplify right side
    438,427.16x = 91,368,561,478.37
  5. Step 5: Solve for x
    x = 91,368,561,478.37/438,427.16
  6. Step 6: Final answer
    x = 208,400.78

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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.