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Finding the Fourth Proportional to 662.91, 992.93 and 479.91

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Solution

The fourth proportional to 662.91, 992.93 and 479.91 is: 718.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.91 : 992.93 = 479.91 : x
  2. Step 2: Convert to fraction form
    662.91/992.93 = 479.91/x
  3. Step 3: Cross multiply
    662.91x = 992.93 × 479.91
  4. Step 4: Simplify right side
    662.91x = 476,514.64
  5. Step 5: Solve for x
    x = 476,514.64/662.91
  6. Step 6: Final answer
    x = 718.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.