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Finding the Fourth Proportional to 580.77, 801.47 and 318.79

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Solution

The fourth proportional to 580.77, 801.47 and 318.79 is: 439.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.77 : 801.47 = 318.79 : x
  2. Step 2: Convert to fraction form
    580.77/801.47 = 318.79/x
  3. Step 3: Cross multiply
    580.77x = 801.47 × 318.79
  4. Step 4: Simplify right side
    580.77x = 255,497.02
  5. Step 5: Solve for x
    x = 255,497.02/580.77
  6. Step 6: Final answer
    x = 439.93

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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.