Home / 1,215,765.40-1,821,023.70-790,612.60

Finding the Fourth Proportional to 1,215,765.40, 1,821,023.70 and 790,612.60

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Solution

The fourth proportional to 1,215,765.40, 1,821,023.70 and 790,612.60 is: 1,184,212.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,765.40 : 1,821,023.70 = 790,612.60 : x
  2. Step 2: Convert to fraction form
    1,215,765.40/1,821,023.70 = 790,612.60/x
  3. Step 3: Cross multiply
    1,215,765.40x = 1,821,023.70 × 790,612.60
  4. Step 4: Simplify right side
    1,215,765.40x = 1,439,724,282,118.62
  5. Step 5: Solve for x
    x = 1,439,724,282,118.62/1,215,765.40
  6. Step 6: Final answer
    x = 1,184,212.25

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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.