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Finding the Fourth Proportional to 799.99, 1,200.25 and 507.71

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Solution

The fourth proportional to 799.99, 1,200.25 and 507.71 is: 761.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.99 : 1,200.25 = 507.71 : x
  2. Step 2: Convert to fraction form
    799.99/1,200.25 = 507.71/x
  3. Step 3: Cross multiply
    799.99x = 1,200.25 × 507.71
  4. Step 4: Simplify right side
    799.99x = 609,378.93
  5. Step 5: Solve for x
    x = 609,378.93/799.99
  6. Step 6: Final answer
    x = 761.73

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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.