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Finding the Fourth Proportional to 316.07, 473.20 and 210.69

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Solution

The fourth proportional to 316.07, 473.20 and 210.69 is: 315.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.07 : 473.20 = 210.69 : x
  2. Step 2: Convert to fraction form
    316.07/473.20 = 210.69/x
  3. Step 3: Cross multiply
    316.07x = 473.20 × 210.69
  4. Step 4: Simplify right side
    316.07x = 99,699.90
  5. Step 5: Solve for x
    x = 99,699.90/316.07
  6. Step 6: Final answer
    x = 315.44

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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.