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Finding the Fourth Proportional to 580.02, 869.40 and 255

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Solution

The fourth proportional to 580.02, 869.40 and 255 is: 382.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.02 : 869.40 = 255 : x
  2. Step 2: Convert to fraction form
    580.02/869.40 = 255/x
  3. Step 3: Cross multiply
    580.02x = 869.40 × 255
  4. Step 4: Simplify right side
    580.02x = 221,697
  5. Step 5: Solve for x
    x = 221,697/580.02
  6. Step 6: Final answer
    x = 382.22

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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.