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Finding the Fourth Proportional to 508.21, 761.16 and 397.63

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Solution

The fourth proportional to 508.21, 761.16 and 397.63 is: 595.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.21 : 761.16 = 397.63 : x
  2. Step 2: Convert to fraction form
    508.21/761.16 = 397.63/x
  3. Step 3: Cross multiply
    508.21x = 761.16 × 397.63
  4. Step 4: Simplify right side
    508.21x = 302,662.49
  5. Step 5: Solve for x
    x = 302,662.49/508.21
  6. Step 6: Final answer
    x = 595.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.