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Finding the Fourth Proportional to 579.70, 813.20 and 579.70

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Solution

The fourth proportional to 579.70, 813.20 and 579.70 is: 813.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.70 : 813.20 = 579.70 : x
  2. Step 2: Convert to fraction form
    579.70/813.20 = 579.70/x
  3. Step 3: Cross multiply
    579.70x = 813.20 × 579.70
  4. Step 4: Simplify right side
    579.70x = 471,412.04
  5. Step 5: Solve for x
    x = 471,412.04/579.70
  6. Step 6: Final answer
    x = 813.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.