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Finding the Fourth Proportional to 521.86, 782.85 and 192.79

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Solution

The fourth proportional to 521.86, 782.85 and 192.79 is: 289.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.86 : 782.85 = 192.79 : x
  2. Step 2: Convert to fraction form
    521.86/782.85 = 192.79/x
  3. Step 3: Cross multiply
    521.86x = 782.85 × 192.79
  4. Step 4: Simplify right side
    521.86x = 150,925.65
  5. Step 5: Solve for x
    x = 150,925.65/521.86
  6. Step 6: Final answer
    x = 289.21

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Similar ratio
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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.