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Finding the Fourth Proportional to 317.16, 437.86 and 303.40

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Solution

The fourth proportional to 317.16, 437.86 and 303.40 is: 418.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.16 : 437.86 = 303.40 : x
  2. Step 2: Convert to fraction form
    317.16/437.86 = 303.40/x
  3. Step 3: Cross multiply
    317.16x = 437.86 × 303.40
  4. Step 4: Simplify right side
    317.16x = 132,846.72
  5. Step 5: Solve for x
    x = 132,846.72/317.16
  6. Step 6: Final answer
    x = 418.86

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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.