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Finding the Fourth Proportional to 820.32, 1,133.64 and 672.66

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Solution

The fourth proportional to 820.32, 1,133.64 and 672.66 is: 929.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.32 : 1,133.64 = 672.66 : x
  2. Step 2: Convert to fraction form
    820.32/1,133.64 = 672.66/x
  3. Step 3: Cross multiply
    820.32x = 1,133.64 × 672.66
  4. Step 4: Simplify right side
    820.32x = 762,554.28
  5. Step 5: Solve for x
    x = 762,554.28/820.32
  6. Step 6: Final answer
    x = 929.58

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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.