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Finding the Fourth Proportional to 505.16, 699.12 and 493.04

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Solution

The fourth proportional to 505.16, 699.12 and 493.04 is: 682.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.16 : 699.12 = 493.04 : x
  2. Step 2: Convert to fraction form
    505.16/699.12 = 493.04/x
  3. Step 3: Cross multiply
    505.16x = 699.12 × 493.04
  4. Step 4: Simplify right side
    505.16x = 344,694.12
  5. Step 5: Solve for x
    x = 344,694.12/505.16
  6. Step 6: Final answer
    x = 682.35

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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.