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Finding the Fourth Proportional to 470.10, 705.15 and 145.43

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Solution

The fourth proportional to 470.10, 705.15 and 145.43 is: 218.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.10 : 705.15 = 145.43 : x
  2. Step 2: Convert to fraction form
    470.10/705.15 = 145.43/x
  3. Step 3: Cross multiply
    470.10x = 705.15 × 145.43
  4. Step 4: Simplify right side
    470.10x = 102,546.44
  5. Step 5: Solve for x
    x = 102,546.44/470.10
  6. Step 6: Final answer
    x = 218.14

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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.