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Finding the Fourth Proportional to 513.87, 707.08 and 499.51

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Solution

The fourth proportional to 513.87, 707.08 and 499.51 is: 687.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.87 : 707.08 = 499.51 : x
  2. Step 2: Convert to fraction form
    513.87/707.08 = 499.51/x
  3. Step 3: Cross multiply
    513.87x = 707.08 × 499.51
  4. Step 4: Simplify right side
    513.87x = 353,193.53
  5. Step 5: Solve for x
    x = 353,193.53/513.87
  6. Step 6: Final answer
    x = 687.33

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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.