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Finding the Fourth Proportional to 729.36, 1,006.54 and 414.67

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Solution

The fourth proportional to 729.36, 1,006.54 and 414.67 is: 572.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.36 : 1,006.54 = 414.67 : x
  2. Step 2: Convert to fraction form
    729.36/1,006.54 = 414.67/x
  3. Step 3: Cross multiply
    729.36x = 1,006.54 × 414.67
  4. Step 4: Simplify right side
    729.36x = 417,379.87
  5. Step 5: Solve for x
    x = 417,379.87/729.36
  6. Step 6: Final answer
    x = 572.26

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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.