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Finding the Fourth Proportional to 470.86, 705.87 and 316.18

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Solution

The fourth proportional to 470.86, 705.87 and 316.18 is: 473.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.86 : 705.87 = 316.18 : x
  2. Step 2: Convert to fraction form
    470.86/705.87 = 316.18/x
  3. Step 3: Cross multiply
    470.86x = 705.87 × 316.18
  4. Step 4: Simplify right side
    470.86x = 223,181.98
  5. Step 5: Solve for x
    x = 223,181.98/470.86
  6. Step 6: Final answer
    x = 473.99

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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.