Home / 1,215,110.40-1,820,041.20-653,488.80

Finding the Fourth Proportional to 1,215,110.40, 1,820,041.20 and 653,488.80

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Solution

The fourth proportional to 1,215,110.40, 1,820,041.20 and 653,488.80 is: 978,821.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,110.40 : 1,820,041.20 = 653,488.80 : x
  2. Step 2: Convert to fraction form
    1,215,110.40/1,820,041.20 = 653,488.80/x
  3. Step 3: Cross multiply
    1,215,110.40x = 1,820,041.20 × 653,488.80
  4. Step 4: Simplify right side
    1,215,110.40x = 1,189,376,539,738.56
  5. Step 5: Solve for x
    x = 1,189,376,539,738.56/1,215,110.40
  6. Step 6: Final answer
    x = 978,821.79

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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.