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Finding the Fourth Proportional to 758.27, 1,136.58 and 319.41

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Solution

The fourth proportional to 758.27, 1,136.58 and 319.41 is: 478.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.27 : 1,136.58 = 319.41 : x
  2. Step 2: Convert to fraction form
    758.27/1,136.58 = 319.41/x
  3. Step 3: Cross multiply
    758.27x = 1,136.58 × 319.41
  4. Step 4: Simplify right side
    758.27x = 363,035.02
  5. Step 5: Solve for x
    x = 363,035.02/758.27
  6. Step 6: Final answer
    x = 478.77

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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.