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Finding the Fourth Proportional to 807.95, 1,211.94 and 499.93

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Solution

The fourth proportional to 807.95, 1,211.94 and 499.93 is: 749.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.95 : 1,211.94 = 499.93 : x
  2. Step 2: Convert to fraction form
    807.95/1,211.94 = 499.93/x
  3. Step 3: Cross multiply
    807.95x = 1,211.94 × 499.93
  4. Step 4: Simplify right side
    807.95x = 605,882.13
  5. Step 5: Solve for x
    x = 605,882.13/807.95
  6. Step 6: Final answer
    x = 749.90

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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.