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Finding the Fourth Proportional to 561.24, 839.40 and 499.98

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Solution

The fourth proportional to 561.24, 839.40 and 499.98 is: 747.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.24 : 839.40 = 499.98 : x
  2. Step 2: Convert to fraction form
    561.24/839.40 = 499.98/x
  3. Step 3: Cross multiply
    561.24x = 839.40 × 499.98
  4. Step 4: Simplify right side
    561.24x = 419,683.21
  5. Step 5: Solve for x
    x = 419,683.21/561.24
  6. Step 6: Final answer
    x = 747.78

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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.