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Finding the Fourth Proportional to 560.49, 773.51 and 311.81

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Solution

The fourth proportional to 560.49, 773.51 and 311.81 is: 430.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.49 : 773.51 = 311.81 : x
  2. Step 2: Convert to fraction form
    560.49/773.51 = 311.81/x
  3. Step 3: Cross multiply
    560.49x = 773.51 × 311.81
  4. Step 4: Simplify right side
    560.49x = 241,182.73
  5. Step 5: Solve for x
    x = 241,182.73/560.49
  6. Step 6: Final answer
    x = 430.31

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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.