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Finding the Fourth Proportional to 851.08, 1,276.58 and 499.88

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Solution

The fourth proportional to 851.08, 1,276.58 and 499.88 is: 749.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.08 : 1,276.58 = 499.88 : x
  2. Step 2: Convert to fraction form
    851.08/1,276.58 = 499.88/x
  3. Step 3: Cross multiply
    851.08x = 1,276.58 × 499.88
  4. Step 4: Simplify right side
    851.08x = 638,136.81
  5. Step 5: Solve for x
    x = 638,136.81/851.08
  6. Step 6: Final answer
    x = 749.80

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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.