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Finding the Fourth Proportional to 580.06, 870.30 and 287.68

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Solution

The fourth proportional to 580.06, 870.30 and 287.68 is: 431.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.06 : 870.30 = 287.68 : x
  2. Step 2: Convert to fraction form
    580.06/870.30 = 287.68/x
  3. Step 3: Cross multiply
    580.06x = 870.30 × 287.68
  4. Step 4: Simplify right side
    580.06x = 250,367.90
  5. Step 5: Solve for x
    x = 250,367.90/580.06
  6. Step 6: Final answer
    x = 431.62

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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.