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Finding the Fourth Proportional to 479.68, 661.58 and 322.26

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Solution

The fourth proportional to 479.68, 661.58 and 322.26 is: 444.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.68 : 661.58 = 322.26 : x
  2. Step 2: Convert to fraction form
    479.68/661.58 = 322.26/x
  3. Step 3: Cross multiply
    479.68x = 661.58 × 322.26
  4. Step 4: Simplify right side
    479.68x = 213,200.77
  5. Step 5: Solve for x
    x = 213,200.77/479.68
  6. Step 6: Final answer
    x = 444.46

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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.