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Finding the Fourth Proportional to 850.34, 1,276.58 and 722.90

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Solution

The fourth proportional to 850.34, 1,276.58 and 722.90 is: 1,085.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.34 : 1,276.58 = 722.90 : x
  2. Step 2: Convert to fraction form
    850.34/1,276.58 = 722.90/x
  3. Step 3: Cross multiply
    850.34x = 1,276.58 × 722.90
  4. Step 4: Simplify right side
    850.34x = 922,835.11
  5. Step 5: Solve for x
    x = 922,835.11/850.34
  6. Step 6: Final answer
    x = 1,085.26

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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.