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Finding the Fourth Proportional to 529.69, 730.32 and 389.38

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Solution

The fourth proportional to 529.69, 730.32 and 389.38 is: 536.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.69 : 730.32 = 389.38 : x
  2. Step 2: Convert to fraction form
    529.69/730.32 = 389.38/x
  3. Step 3: Cross multiply
    529.69x = 730.32 × 389.38
  4. Step 4: Simplify right side
    529.69x = 284,372.00
  5. Step 5: Solve for x
    x = 284,372.00/529.69
  6. Step 6: Final answer
    x = 536.86

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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.