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Finding the Fourth Proportional to 444.80, 612.68 and 313.58

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Solution

The fourth proportional to 444.80, 612.68 and 313.58 is: 431.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.80 : 612.68 = 313.58 : x
  2. Step 2: Convert to fraction form
    444.80/612.68 = 313.58/x
  3. Step 3: Cross multiply
    444.80x = 612.68 × 313.58
  4. Step 4: Simplify right side
    444.80x = 192,119.56
  5. Step 5: Solve for x
    x = 192,119.56/444.80
  6. Step 6: Final answer
    x = 431.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.