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Finding the Fourth Proportional to 471.43, 707.59 and 289.18

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Solution

The fourth proportional to 471.43, 707.59 and 289.18 is: 434.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.43 : 707.59 = 289.18 : x
  2. Step 2: Convert to fraction form
    471.43/707.59 = 289.18/x
  3. Step 3: Cross multiply
    471.43x = 707.59 × 289.18
  4. Step 4: Simplify right side
    471.43x = 204,619.47
  5. Step 5: Solve for x
    x = 204,619.47/471.43
  6. Step 6: Final answer
    x = 434.04

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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.