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Finding the Fourth Proportional to 471.36, 707.88 and 309.36

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Solution

The fourth proportional to 471.36, 707.88 and 309.36 is: 464.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.36 : 707.88 = 309.36 : x
  2. Step 2: Convert to fraction form
    471.36/707.88 = 309.36/x
  3. Step 3: Cross multiply
    471.36x = 707.88 × 309.36
  4. Step 4: Simplify right side
    471.36x = 218,989.76
  5. Step 5: Solve for x
    x = 218,989.76/471.36
  6. Step 6: Final answer
    x = 464.59

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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.