Home / 1,212,387.40-1,818,408.30-413,705.80

Finding the Fourth Proportional to 1,212,387.40, 1,818,408.30 and 413,705.80

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Solution

The fourth proportional to 1,212,387.40, 1,818,408.30 and 413,705.80 is: 620,499.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,387.40 : 1,818,408.30 = 413,705.80 : x
  2. Step 2: Convert to fraction form
    1,212,387.40/1,818,408.30 = 413,705.80/x
  3. Step 3: Cross multiply
    1,212,387.40x = 1,818,408.30 × 413,705.80
  4. Step 4: Simplify right side
    1,212,387.40x = 752,286,060,478.14
  5. Step 5: Solve for x
    x = 752,286,060,478.14/1,212,387.40
  6. Step 6: Final answer
    x = 620,499.74

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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.