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Finding the Fourth Proportional to 580.79, 801.54 and 318.86

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Solution

The fourth proportional to 580.79, 801.54 and 318.86 is: 440.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.79 : 801.54 = 318.86 : x
  2. Step 2: Convert to fraction form
    580.79/801.54 = 318.86/x
  3. Step 3: Cross multiply
    580.79x = 801.54 × 318.86
  4. Step 4: Simplify right side
    580.79x = 255,575.04
  5. Step 5: Solve for x
    x = 255,575.04/580.79
  6. Step 6: Final answer
    x = 440.05

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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.