Home / 672,905.80-1,007,997.90-419,408.20

Finding the Fourth Proportional to 672,905.80, 1,007,997.90 and 419,408.20

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Solution

The fourth proportional to 672,905.80, 1,007,997.90 and 419,408.20 is: 628,264.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,905.80 : 1,007,997.90 = 419,408.20 : x
  2. Step 2: Convert to fraction form
    672,905.80/1,007,997.90 = 419,408.20/x
  3. Step 3: Cross multiply
    672,905.80x = 1,007,997.90 × 419,408.20
  4. Step 4: Simplify right side
    672,905.80x = 422,762,584,842.78
  5. Step 5: Solve for x
    x = 422,762,584,842.78/672,905.80
  6. Step 6: Final answer
    x = 628,264.14

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1.5x scale

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.