Home / 672,921.80-1,008,021.90-419,424.20

Finding the Fourth Proportional to 672,921.80, 1,008,021.90 and 419,424.20

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Solution

The fourth proportional to 672,921.80, 1,008,021.90 and 419,424.20 is: 628,288.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,921.80 : 1,008,021.90 = 419,424.20 : x
  2. Step 2: Convert to fraction form
    672,921.80/1,008,021.90 = 419,424.20/x
  3. Step 3: Cross multiply
    672,921.80x = 1,008,021.90 × 419,424.20
  4. Step 4: Simplify right side
    672,921.80x = 422,788,778,989.98
  5. Step 5: Solve for x
    x = 422,788,778,989.98/672,921.80
  6. Step 6: Final answer
    x = 628,288.13

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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.