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Finding the Fourth Proportional to 579.70, 869.70 and 255.04

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Solution

The fourth proportional to 579.70, 869.70 and 255.04 is: 382.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.70 : 869.70 = 255.04 : x
  2. Step 2: Convert to fraction form
    579.70/869.70 = 255.04/x
  3. Step 3: Cross multiply
    579.70x = 869.70 × 255.04
  4. Step 4: Simplify right side
    579.70x = 221,808.29
  5. Step 5: Solve for x
    x = 221,808.29/579.70
  6. Step 6: Final answer
    x = 382.63

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1.5x scale

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.