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Finding the Fourth Proportional to 560.66, 773.70 and 311.99

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Solution

The fourth proportional to 560.66, 773.70 and 311.99 is: 430.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.66 : 773.70 = 311.99 : x
  2. Step 2: Convert to fraction form
    560.66/773.70 = 311.99/x
  3. Step 3: Cross multiply
    560.66x = 773.70 × 311.99
  4. Step 4: Simplify right side
    560.66x = 241,382.79
  5. Step 5: Solve for x
    x = 241,382.79/560.66
  6. Step 6: Final answer
    x = 430.54

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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.