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Finding the Fourth Proportional to 561.89, 775.44 and 340.85

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Solution

The fourth proportional to 561.89, 775.44 and 340.85 is: 470.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.89 : 775.44 = 340.85 : x
  2. Step 2: Convert to fraction form
    561.89/775.44 = 340.85/x
  3. Step 3: Cross multiply
    561.89x = 775.44 × 340.85
  4. Step 4: Simplify right side
    561.89x = 264,310.66
  5. Step 5: Solve for x
    x = 264,310.66/561.89
  6. Step 6: Final answer
    x = 470.39

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1.5x scale

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.