Home / 378,218.96-521,945.80-208,459.60

Finding the Fourth Proportional to 378,218.96, 521,945.80 and 208,459.60

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Solution

The fourth proportional to 378,218.96, 521,945.80 and 208,459.60 is: 287,676.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,218.96 : 521,945.80 = 208,459.60 : x
  2. Step 2: Convert to fraction form
    378,218.96/521,945.80 = 208,459.60/x
  3. Step 3: Cross multiply
    378,218.96x = 521,945.80 × 208,459.60
  4. Step 4: Simplify right side
    378,218.96x = 108,804,612,689.68
  5. Step 5: Solve for x
    x = 108,804,612,689.68/378,218.96
  6. Step 6: Final answer
    x = 287,676.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.