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Finding the Fourth Proportional to 425.94, 587.16 and 347.64

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Solution

The fourth proportional to 425.94, 587.16 and 347.64 is: 479.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.94 : 587.16 = 347.64 : x
  2. Step 2: Convert to fraction form
    425.94/587.16 = 347.64/x
  3. Step 3: Cross multiply
    425.94x = 587.16 × 347.64
  4. Step 4: Simplify right side
    425.94x = 204,120.30
  5. Step 5: Solve for x
    x = 204,120.30/425.94
  6. Step 6: Final answer
    x = 479.22

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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.