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Finding the Fourth Proportional to 729.32, 1,006.26 and 434.64

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Solution

The fourth proportional to 729.32, 1,006.26 and 434.64 is: 599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.32 : 1,006.26 = 434.64 : x
  2. Step 2: Convert to fraction form
    729.32/1,006.26 = 434.64/x
  3. Step 3: Cross multiply
    729.32x = 1,006.26 × 434.64
  4. Step 4: Simplify right side
    729.32x = 437,360.85
  5. Step 5: Solve for x
    x = 437,360.85/729.32
  6. Step 6: Final answer
    x = 599.68

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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.