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Finding the Fourth Proportional to 580.81, 801.52 and 318.85

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Solution

The fourth proportional to 580.81, 801.52 and 318.85 is: 440.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.81 : 801.52 = 318.85 : x
  2. Step 2: Convert to fraction form
    580.81/801.52 = 318.85/x
  3. Step 3: Cross multiply
    580.81x = 801.52 × 318.85
  4. Step 4: Simplify right side
    580.81x = 255,561.04
  5. Step 5: Solve for x
    x = 255,561.04/580.81
  6. Step 6: Final answer
    x = 440.01

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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.