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Finding the Fourth Proportional to 835.49, 1,253.44 and 287.53

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Solution

The fourth proportional to 835.49, 1,253.44 and 287.53 is: 431.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.49 : 1,253.44 = 287.53 : x
  2. Step 2: Convert to fraction form
    835.49/1,253.44 = 287.53/x
  3. Step 3: Cross multiply
    835.49x = 1,253.44 × 287.53
  4. Step 4: Simplify right side
    835.49x = 360,401.60
  5. Step 5: Solve for x
    x = 360,401.60/835.49
  6. Step 6: Final answer
    x = 431.37

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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.