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Finding the Fourth Proportional to 508.14, 699.30 and 486.27

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Solution

The fourth proportional to 508.14, 699.30 and 486.27 is: 669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.14 : 699.30 = 486.27 : x
  2. Step 2: Convert to fraction form
    508.14/699.30 = 486.27/x
  3. Step 3: Cross multiply
    508.14x = 699.30 × 486.27
  4. Step 4: Simplify right side
    508.14x = 340,048.61
  5. Step 5: Solve for x
    x = 340,048.61/508.14
  6. Step 6: Final answer
    x = 669.20

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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.