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Finding the Fourth Proportional to 479.58, 661.32 and 346.95

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Solution

The fourth proportional to 479.58, 661.32 and 346.95 is: 478.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.58 : 661.32 = 346.95 : x
  2. Step 2: Convert to fraction form
    479.58/661.32 = 346.95/x
  3. Step 3: Cross multiply
    479.58x = 661.32 × 346.95
  4. Step 4: Simplify right side
    479.58x = 229,444.97
  5. Step 5: Solve for x
    x = 229,444.97/479.58
  6. Step 6: Final answer
    x = 478.43

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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.