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Finding the Fourth Proportional to 617.88, 852.48 and 493.14

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Solution

The fourth proportional to 617.88, 852.48 and 493.14 is: 680.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.88 : 852.48 = 493.14 : x
  2. Step 2: Convert to fraction form
    617.88/852.48 = 493.14/x
  3. Step 3: Cross multiply
    617.88x = 852.48 × 493.14
  4. Step 4: Simplify right side
    617.88x = 420,391.99
  5. Step 5: Solve for x
    x = 420,391.99/617.88
  6. Step 6: Final answer
    x = 680.38

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Half scale
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Double scale
Find fourth proportional to 618.88, 853.86 and 494.14
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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.