Home / 850.90-1,276.37-302.80

Finding the Fourth Proportional to 850.90, 1,276.37 and 302.80

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Solution

The fourth proportional to 850.90, 1,276.37 and 302.80 is: 454.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.90 : 1,276.37 = 302.80 : x
  2. Step 2: Convert to fraction form
    850.90/1,276.37 = 302.80/x
  3. Step 3: Cross multiply
    850.90x = 1,276.37 × 302.80
  4. Step 4: Simplify right side
    850.90x = 386,484.84
  5. Step 5: Solve for x
    x = 386,484.84/850.90
  6. Step 6: Final answer
    x = 454.21

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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.