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Finding the Fourth Proportional to 613.60, 920.40 and 573.10

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Solution

The fourth proportional to 613.60, 920.40 and 573.10 is: 859.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.60 : 920.40 = 573.10 : x
  2. Step 2: Convert to fraction form
    613.60/920.40 = 573.10/x
  3. Step 3: Cross multiply
    613.60x = 920.40 × 573.10
  4. Step 4: Simplify right side
    613.60x = 527,481.24
  5. Step 5: Solve for x
    x = 527,481.24/613.60
  6. Step 6: Final answer
    x = 859.65

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Similar ratio
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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.