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Finding the Fourth Proportional to 580.95, 801.72 and 318.96

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Solution

The fourth proportional to 580.95, 801.72 and 318.96 is: 440.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.95 : 801.72 = 318.96 : x
  2. Step 2: Convert to fraction form
    580.95/801.72 = 318.96/x
  3. Step 3: Cross multiply
    580.95x = 801.72 × 318.96
  4. Step 4: Simplify right side
    580.95x = 255,716.61
  5. Step 5: Solve for x
    x = 255,716.61/580.95
  6. Step 6: Final answer
    x = 440.17

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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.