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Finding the Fourth Proportional to 580.60, 869.10 and 418.60

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Solution

The fourth proportional to 580.60, 869.10 and 418.60 is: 626.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.60 : 869.10 = 418.60 : x
  2. Step 2: Convert to fraction form
    580.60/869.10 = 418.60/x
  3. Step 3: Cross multiply
    580.60x = 869.10 × 418.60
  4. Step 4: Simplify right side
    580.60x = 363,805.26
  5. Step 5: Solve for x
    x = 363,805.26/580.60
  6. Step 6: Final answer
    x = 626.60

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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.