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Finding the Fourth Proportional to 474.86, 655.71 and 309.37

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Solution

The fourth proportional to 474.86, 655.71 and 309.37 is: 427.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.86 : 655.71 = 309.37 : x
  2. Step 2: Convert to fraction form
    474.86/655.71 = 309.37/x
  3. Step 3: Cross multiply
    474.86x = 655.71 × 309.37
  4. Step 4: Simplify right side
    474.86x = 202,857.00
  5. Step 5: Solve for x
    x = 202,857.00/474.86
  6. Step 6: Final answer
    x = 427.19

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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.