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Finding the Fourth Proportional to 561.99, 775.35 and 372.99

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Solution

The fourth proportional to 561.99, 775.35 and 372.99 is: 514.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.99 : 775.35 = 372.99 : x
  2. Step 2: Convert to fraction form
    561.99/775.35 = 372.99/x
  3. Step 3: Cross multiply
    561.99x = 775.35 × 372.99
  4. Step 4: Simplify right side
    561.99x = 289,197.80
  5. Step 5: Solve for x
    x = 289,197.80/561.99
  6. Step 6: Final answer
    x = 514.60

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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.