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Finding the Fourth Proportional to 318.84, 437.08 and 303.18

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Solution

The fourth proportional to 318.84, 437.08 and 303.18 is: 415.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.84 : 437.08 = 303.18 : x
  2. Step 2: Convert to fraction form
    318.84/437.08 = 303.18/x
  3. Step 3: Cross multiply
    318.84x = 437.08 × 303.18
  4. Step 4: Simplify right side
    318.84x = 132,513.91
  5. Step 5: Solve for x
    x = 132,513.91/318.84
  6. Step 6: Final answer
    x = 415.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.