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Finding the Fourth Proportional to 326.77, 486.98 and 316.89

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Solution

The fourth proportional to 326.77, 486.98 and 316.89 is: 472.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.77 : 486.98 = 316.89 : x
  2. Step 2: Convert to fraction form
    326.77/486.98 = 316.89/x
  3. Step 3: Cross multiply
    326.77x = 486.98 × 316.89
  4. Step 4: Simplify right side
    326.77x = 154,317.51
  5. Step 5: Solve for x
    x = 154,317.51/326.77
  6. Step 6: Final answer
    x = 472.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.