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Finding the Fourth Proportional to 1,321.52, 1,824.45 and 902.48

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Solution

The fourth proportional to 1,321.52, 1,824.45 and 902.48 is: 1,245.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.52 : 1,824.45 = 902.48 : x
  2. Step 2: Convert to fraction form
    1,321.52/1,824.45 = 902.48/x
  3. Step 3: Cross multiply
    1,321.52x = 1,824.45 × 902.48
  4. Step 4: Simplify right side
    1,321.52x = 1,646,536.48
  5. Step 5: Solve for x
    x = 1,646,536.48/1,321.52
  6. Step 6: Final answer
    x = 1,245.94

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1.5x scale

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.