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Finding the Fourth Proportional to 580.15, 870.41 and 518.89

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Solution

The fourth proportional to 580.15, 870.41 and 518.89 is: 778.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.15 : 870.41 = 518.89 : x
  2. Step 2: Convert to fraction form
    580.15/870.41 = 518.89/x
  3. Step 3: Cross multiply
    580.15x = 870.41 × 518.89
  4. Step 4: Simplify right side
    580.15x = 451,647.04
  5. Step 5: Solve for x
    x = 451,647.04/580.15
  6. Step 6: Final answer
    x = 778.50

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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.