Home / 1,212,389.40-1,818,411.30-413,707.80

Finding the Fourth Proportional to 1,212,389.40, 1,818,411.30 and 413,707.80

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Solution

The fourth proportional to 1,212,389.40, 1,818,411.30 and 413,707.80 is: 620,502.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,389.40 : 1,818,411.30 = 413,707.80 : x
  2. Step 2: Convert to fraction form
    1,212,389.40/1,818,411.30 = 413,707.80/x
  3. Step 3: Cross multiply
    1,212,389.40x = 1,818,411.30 × 413,707.80
  4. Step 4: Simplify right side
    1,212,389.40x = 752,290,938,418.14
  5. Step 5: Solve for x
    x = 752,290,938,418.14/1,212,389.40
  6. Step 6: Final answer
    x = 620,502.73

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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.