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Finding the Fourth Proportional to 316.80, 473.06 and 259.14

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Solution

The fourth proportional to 316.80, 473.06 and 259.14 is: 386.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.80 : 473.06 = 259.14 : x
  2. Step 2: Convert to fraction form
    316.80/473.06 = 259.14/x
  3. Step 3: Cross multiply
    316.80x = 473.06 × 259.14
  4. Step 4: Simplify right side
    316.80x = 122,588.77
  5. Step 5: Solve for x
    x = 122,588.77/316.80
  6. Step 6: Final answer
    x = 386.96

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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.