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Finding the Fourth Proportional to 560.43, 773.44 and 311.77

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Solution

The fourth proportional to 560.43, 773.44 and 311.77 is: 430.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.43 : 773.44 = 311.77 : x
  2. Step 2: Convert to fraction form
    560.43/773.44 = 311.77/x
  3. Step 3: Cross multiply
    560.43x = 773.44 × 311.77
  4. Step 4: Simplify right side
    560.43x = 241,135.39
  5. Step 5: Solve for x
    x = 241,135.39/560.43
  6. Step 6: Final answer
    x = 430.27

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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.