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Finding the Fourth Proportional to 580.89, 801.62 and 318.92

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Solution

The fourth proportional to 580.89, 801.62 and 318.92 is: 440.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.89 : 801.62 = 318.92 : x
  2. Step 2: Convert to fraction form
    580.89/801.62 = 318.92/x
  3. Step 3: Cross multiply
    580.89x = 801.62 × 318.92
  4. Step 4: Simplify right side
    580.89x = 255,647.05
  5. Step 5: Solve for x
    x = 255,647.05/580.89
  6. Step 6: Final answer
    x = 440.10

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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.