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Finding the Fourth Proportional to 470.56, 705.92 and 145.92

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Solution

The fourth proportional to 470.56, 705.92 and 145.92 is: 218.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.56 : 705.92 = 145.92 : x
  2. Step 2: Convert to fraction form
    470.56/705.92 = 145.92/x
  3. Step 3: Cross multiply
    470.56x = 705.92 × 145.92
  4. Step 4: Simplify right side
    470.56x = 103,007.85
  5. Step 5: Solve for x
    x = 103,007.85/470.56
  6. Step 6: Final answer
    x = 218.90

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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.