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Finding the Fourth Proportional to 478.32, 659.88 and 347.44

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Solution

The fourth proportional to 478.32, 659.88 and 347.44 is: 479.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.32 : 659.88 = 347.44 : x
  2. Step 2: Convert to fraction form
    478.32/659.88 = 347.44/x
  3. Step 3: Cross multiply
    478.32x = 659.88 × 347.44
  4. Step 4: Simplify right side
    478.32x = 229,268.71
  5. Step 5: Solve for x
    x = 229,268.71/478.32
  6. Step 6: Final answer
    x = 479.32

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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.