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Finding the Fourth Proportional to 580.05, 800.46 and 318.08

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Solution

The fourth proportional to 580.05, 800.46 and 318.08 is: 438.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.05 : 800.46 = 318.08 : x
  2. Step 2: Convert to fraction form
    580.05/800.46 = 318.08/x
  3. Step 3: Cross multiply
    580.05x = 800.46 × 318.08
  4. Step 4: Simplify right side
    580.05x = 254,606.31
  5. Step 5: Solve for x
    x = 254,606.31/580.05
  6. Step 6: Final answer
    x = 438.94

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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.