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Finding the Fourth Proportional to 653.86, 980.11 and 263.86

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Solution

The fourth proportional to 653.86, 980.11 and 263.86 is: 395.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.86 : 980.11 = 263.86 : x
  2. Step 2: Convert to fraction form
    653.86/980.11 = 263.86/x
  3. Step 3: Cross multiply
    653.86x = 980.11 × 263.86
  4. Step 4: Simplify right side
    653.86x = 258,611.82
  5. Step 5: Solve for x
    x = 258,611.82/653.86
  6. Step 6: Final answer
    x = 395.52

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1.5x scale

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.