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Finding the Fourth Proportional to 1,193.42, 1,646.56 and 820.82

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Solution

The fourth proportional to 1,193.42, 1,646.56 and 820.82 is: 1,132.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.42 : 1,646.56 = 820.82 : x
  2. Step 2: Convert to fraction form
    1,193.42/1,646.56 = 820.82/x
  3. Step 3: Cross multiply
    1,193.42x = 1,646.56 × 820.82
  4. Step 4: Simplify right side
    1,193.42x = 1,351,529.38
  5. Step 5: Solve for x
    x = 1,351,529.38/1,193.42
  6. Step 6: Final answer
    x = 1,132.48

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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.