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Finding the Fourth Proportional to 477.82, 659.50 and 385.18

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Solution

The fourth proportional to 477.82, 659.50 and 385.18 is: 531.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.82 : 659.50 = 385.18 : x
  2. Step 2: Convert to fraction form
    477.82/659.50 = 385.18/x
  3. Step 3: Cross multiply
    477.82x = 659.50 × 385.18
  4. Step 4: Simplify right side
    477.82x = 254,026.21
  5. Step 5: Solve for x
    x = 254,026.21/477.82
  6. Step 6: Final answer
    x = 531.64

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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.