Home / 859,994.11-1,290,344.78-379,968.57

Finding the Fourth Proportional to 859,994.11, 1,290,344.78 and 379,968.57

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Solution

The fourth proportional to 859,994.11, 1,290,344.78 and 379,968.57 is: 570,109.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,994.11 : 1,290,344.78 = 379,968.57 : x
  2. Step 2: Convert to fraction form
    859,994.11/1,290,344.78 = 379,968.57/x
  3. Step 3: Cross multiply
    859,994.11x = 1,290,344.78 × 379,968.57
  4. Step 4: Simplify right side
    859,994.11x = 490,290,461,813.49
  5. Step 5: Solve for x
    x = 490,290,461,813.49/859,994.11
  6. Step 6: Final answer
    x = 570,109.09

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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.