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Finding the Fourth Proportional to 479.89, 661.80 and 340.03

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Solution

The fourth proportional to 479.89, 661.80 and 340.03 is: 468.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.89 : 661.80 = 340.03 : x
  2. Step 2: Convert to fraction form
    479.89/661.80 = 340.03/x
  3. Step 3: Cross multiply
    479.89x = 661.80 × 340.03
  4. Step 4: Simplify right side
    479.89x = 225,031.85
  5. Step 5: Solve for x
    x = 225,031.85/479.89
  6. Step 6: Final answer
    x = 468.92

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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.