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Finding the Fourth Proportional to 491.16, 679.73 and 479.01

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Solution

The fourth proportional to 491.16, 679.73 and 479.01 is: 662.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.16 : 679.73 = 479.01 : x
  2. Step 2: Convert to fraction form
    491.16/679.73 = 479.01/x
  3. Step 3: Cross multiply
    491.16x = 679.73 × 479.01
  4. Step 4: Simplify right side
    491.16x = 325,595.07
  5. Step 5: Solve for x
    x = 325,595.07/491.16
  6. Step 6: Final answer
    x = 662.91

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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.