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Finding the Fourth Proportional to 530, 730.47 and 389.82

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Solution

The fourth proportional to 530, 730.47 and 389.82 is: 537.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    530 : 730.47 = 389.82 : x
  2. Step 2: Convert to fraction form
    530/730.47 = 389.82/x
  3. Step 3: Cross multiply
    530x = 730.47 × 389.82
  4. Step 4: Simplify right side
    530x = 284,751.82
  5. Step 5: Solve for x
    x = 284,751.82/530
  6. Step 6: Final answer
    x = 537.27

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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.