Home / 378,877.96-522,849-209,112.10

Finding the Fourth Proportional to 378,877.96, 522,849 and 209,112.10

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Solution

The fourth proportional to 378,877.96, 522,849 and 209,112.10 is: 288,573.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,877.96 : 522,849 = 209,112.10 : x
  2. Step 2: Convert to fraction form
    378,877.96/522,849 = 209,112.10/x
  3. Step 3: Cross multiply
    378,877.96x = 522,849 × 209,112.10
  4. Step 4: Simplify right side
    378,877.96x = 109,334,052,372.90
  5. Step 5: Solve for x
    x = 109,334,052,372.90/378,877.96
  6. Step 6: Final answer
    x = 288,573.27

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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.