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Finding the Fourth Proportional to 620.52, 855.93 and 514.99

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Solution

The fourth proportional to 620.52, 855.93 and 514.99 is: 710.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.52 : 855.93 = 514.99 : x
  2. Step 2: Convert to fraction form
    620.52/855.93 = 514.99/x
  3. Step 3: Cross multiply
    620.52x = 855.93 × 514.99
  4. Step 4: Simplify right side
    620.52x = 440,795.39
  5. Step 5: Solve for x
    x = 440,795.39/620.52
  6. Step 6: Final answer
    x = 710.36

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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.