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Finding the Fourth Proportional to 479.51, 661.35 and 440.29

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Solution

The fourth proportional to 479.51, 661.35 and 440.29 is: 607.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.51 : 661.35 = 440.29 : x
  2. Step 2: Convert to fraction form
    479.51/661.35 = 440.29/x
  3. Step 3: Cross multiply
    479.51x = 661.35 × 440.29
  4. Step 4: Simplify right side
    479.51x = 291,185.79
  5. Step 5: Solve for x
    x = 291,185.79/479.51
  6. Step 6: Final answer
    x = 607.26

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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.