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Finding the Fourth Proportional to 613.55, 920.46 and 248.72

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Solution

The fourth proportional to 613.55, 920.46 and 248.72 is: 373.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.55 : 920.46 = 248.72 : x
  2. Step 2: Convert to fraction form
    613.55/920.46 = 248.72/x
  3. Step 3: Cross multiply
    613.55x = 920.46 × 248.72
  4. Step 4: Simplify right side
    613.55x = 228,932.21
  5. Step 5: Solve for x
    x = 228,932.21/613.55
  6. Step 6: Final answer
    x = 373.13

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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.