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Finding the Fourth Proportional to 474.98, 712.46 and 214.79

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Solution

The fourth proportional to 474.98, 712.46 and 214.79 is: 322.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.98 : 712.46 = 214.79 : x
  2. Step 2: Convert to fraction form
    474.98/712.46 = 214.79/x
  3. Step 3: Cross multiply
    474.98x = 712.46 × 214.79
  4. Step 4: Simplify right side
    474.98x = 153,030.39
  5. Step 5: Solve for x
    x = 153,030.39/474.98
  6. Step 6: Final answer
    x = 322.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.