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Finding the Fourth Proportional to 617.43, 852.75 and 486.21

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Solution

The fourth proportional to 617.43, 852.75 and 486.21 is: 671.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.43 : 852.75 = 486.21 : x
  2. Step 2: Convert to fraction form
    617.43/852.75 = 486.21/x
  3. Step 3: Cross multiply
    617.43x = 852.75 × 486.21
  4. Step 4: Simplify right side
    617.43x = 414,615.58
  5. Step 5: Solve for x
    x = 414,615.58/617.43
  6. Step 6: Final answer
    x = 671.52

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1.5x scale

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.