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Finding the Fourth Proportional to 560.62, 773.60 and 311.93

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Solution

The fourth proportional to 560.62, 773.60 and 311.93 is: 430.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.62 : 773.60 = 311.93 : x
  2. Step 2: Convert to fraction form
    560.62/773.60 = 311.93/x
  3. Step 3: Cross multiply
    560.62x = 773.60 × 311.93
  4. Step 4: Simplify right side
    560.62x = 241,309.05
  5. Step 5: Solve for x
    x = 241,309.05/560.62
  6. Step 6: Final answer
    x = 430.43

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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.