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Finding the Fourth Proportional to 488.51, 732.85 and 214.79

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Solution

The fourth proportional to 488.51, 732.85 and 214.79 is: 322.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.51 : 732.85 = 214.79 : x
  2. Step 2: Convert to fraction form
    488.51/732.85 = 214.79/x
  3. Step 3: Cross multiply
    488.51x = 732.85 × 214.79
  4. Step 4: Simplify right side
    488.51x = 157,412.73
  5. Step 5: Solve for x
    x = 157,412.73/488.51
  6. Step 6: Final answer
    x = 322.23

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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.