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Finding the Fourth Proportional to 437.70, 657.63 and 255.18

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Solution

The fourth proportional to 437.70, 657.63 and 255.18 is: 383.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.70 : 657.63 = 255.18 : x
  2. Step 2: Convert to fraction form
    437.70/657.63 = 255.18/x
  3. Step 3: Cross multiply
    437.70x = 657.63 × 255.18
  4. Step 4: Simplify right side
    437.70x = 167,814.02
  5. Step 5: Solve for x
    x = 167,814.02/437.70
  6. Step 6: Final answer
    x = 383.40

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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.