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Finding the Fourth Proportional to 851.67, 1,275.23 and 499.99

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Solution

The fourth proportional to 851.67, 1,275.23 and 499.99 is: 748.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.67 : 1,275.23 = 499.99 : x
  2. Step 2: Convert to fraction form
    851.67/1,275.23 = 499.99/x
  3. Step 3: Cross multiply
    851.67x = 1,275.23 × 499.99
  4. Step 4: Simplify right side
    851.67x = 637,596.62
  5. Step 5: Solve for x
    x = 637,596.62/851.67
  6. Step 6: Final answer
    x = 748.64

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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.