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Finding the Fourth Proportional to 580.20, 870.30 and 516.20

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Solution

The fourth proportional to 580.20, 870.30 and 516.20 is: 774.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.20 : 870.30 = 516.20 : x
  2. Step 2: Convert to fraction form
    580.20/870.30 = 516.20/x
  3. Step 3: Cross multiply
    580.20x = 870.30 × 516.20
  4. Step 4: Simplify right side
    580.20x = 449,248.86
  5. Step 5: Solve for x
    x = 449,248.86/580.20
  6. Step 6: Final answer
    x = 774.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.