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Finding the Fourth Proportional to 718.36, 991.75 and 482.73

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Solution

The fourth proportional to 718.36, 991.75 and 482.73 is: 666.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.36 : 991.75 = 482.73 : x
  2. Step 2: Convert to fraction form
    718.36/991.75 = 482.73/x
  3. Step 3: Cross multiply
    718.36x = 991.75 × 482.73
  4. Step 4: Simplify right side
    718.36x = 478,747.48
  5. Step 5: Solve for x
    x = 478,747.48/718.36
  6. Step 6: Final answer
    x = 666.45

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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.