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Finding the Fourth Proportional to 530, 732.74 and 493.28

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Solution

The fourth proportional to 530, 732.74 and 493.28 is: 681.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    530 : 732.74 = 493.28 : x
  2. Step 2: Convert to fraction form
    530/732.74 = 493.28/x
  3. Step 3: Cross multiply
    530x = 732.74 × 493.28
  4. Step 4: Simplify right side
    530x = 361,445.99
  5. Step 5: Solve for x
    x = 361,445.99/530
  6. Step 6: Final answer
    x = 681.97

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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.