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Finding the Fourth Proportional to 580.09, 800.50 and 318.10

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Solution

The fourth proportional to 580.09, 800.50 and 318.10 is: 438.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.09 : 800.50 = 318.10 : x
  2. Step 2: Convert to fraction form
    580.09/800.50 = 318.10/x
  3. Step 3: Cross multiply
    580.09x = 800.50 × 318.10
  4. Step 4: Simplify right side
    580.09x = 254,639.05
  5. Step 5: Solve for x
    x = 254,639.05/580.09
  6. Step 6: Final answer
    x = 438.96

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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.