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Finding the Fourth Proportional to 729.64, 1,006.44 and 445.93

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Solution

The fourth proportional to 729.64, 1,006.44 and 445.93 is: 615.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.64 : 1,006.44 = 445.93 : x
  2. Step 2: Convert to fraction form
    729.64/1,006.44 = 445.93/x
  3. Step 3: Cross multiply
    729.64x = 1,006.44 × 445.93
  4. Step 4: Simplify right side
    729.64x = 448,796.81
  5. Step 5: Solve for x
    x = 448,796.81/729.64
  6. Step 6: Final answer
    x = 615.09

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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.