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Finding the Fourth Proportional to 675.81, 932.36 and 518.45

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Solution

The fourth proportional to 675.81, 932.36 and 518.45 is: 715.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.81 : 932.36 = 518.45 : x
  2. Step 2: Convert to fraction form
    675.81/932.36 = 518.45/x
  3. Step 3: Cross multiply
    675.81x = 932.36 × 518.45
  4. Step 4: Simplify right side
    675.81x = 483,374.79
  5. Step 5: Solve for x
    x = 483,374.79/675.81
  6. Step 6: Final answer
    x = 715.25

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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.