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Finding the Fourth Proportional to 857.32, 1,180.24 and 818.14

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Solution

The fourth proportional to 857.32, 1,180.24 and 818.14 is: 1,126.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.32 : 1,180.24 = 818.14 : x
  2. Step 2: Convert to fraction form
    857.32/1,180.24 = 818.14/x
  3. Step 3: Cross multiply
    857.32x = 1,180.24 × 818.14
  4. Step 4: Simplify right side
    857.32x = 965,593.55
  5. Step 5: Solve for x
    x = 965,593.55/857.32
  6. Step 6: Final answer
    x = 1,126.30

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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.