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Finding the Fourth Proportional to 561.99, 775.53 and 488.28

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Solution

The fourth proportional to 561.99, 775.53 and 488.28 is: 673.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.99 : 775.53 = 488.28 : x
  2. Step 2: Convert to fraction form
    561.99/775.53 = 488.28/x
  3. Step 3: Cross multiply
    561.99x = 775.53 × 488.28
  4. Step 4: Simplify right side
    561.99x = 378,675.79
  5. Step 5: Solve for x
    x = 378,675.79/561.99
  6. Step 6: Final answer
    x = 673.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.