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Finding the Fourth Proportional to 479.82, 661.98 and 314.25

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Solution

The fourth proportional to 479.82, 661.98 and 314.25 is: 433.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.82 : 661.98 = 314.25 : x
  2. Step 2: Convert to fraction form
    479.82/661.98 = 314.25/x
  3. Step 3: Cross multiply
    479.82x = 661.98 × 314.25
  4. Step 4: Simplify right side
    479.82x = 208,027.22
  5. Step 5: Solve for x
    x = 208,027.22/479.82
  6. Step 6: Final answer
    x = 433.55

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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.