Home / 850.20-1,172.50-551.31

Finding the Fourth Proportional to 850.20, 1,172.50 and 551.31

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Solution

The fourth proportional to 850.20, 1,172.50 and 551.31 is: 760.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.20 : 1,172.50 = 551.31 : x
  2. Step 2: Convert to fraction form
    850.20/1,172.50 = 551.31/x
  3. Step 3: Cross multiply
    850.20x = 1,172.50 × 551.31
  4. Step 4: Simplify right side
    850.20x = 646,410.98
  5. Step 5: Solve for x
    x = 646,410.98/850.20
  6. Step 6: Final answer
    x = 760.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.