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Finding the Fourth Proportional to 479.32, 661.35 and 322.25

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Solution

The fourth proportional to 479.32, 661.35 and 322.25 is: 444.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.32 : 661.35 = 322.25 : x
  2. Step 2: Convert to fraction form
    479.32/661.35 = 322.25/x
  3. Step 3: Cross multiply
    479.32x = 661.35 × 322.25
  4. Step 4: Simplify right side
    479.32x = 213,116.13
  5. Step 5: Solve for x
    x = 213,116.13/479.32
  6. Step 6: Final answer
    x = 444.62

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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.