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Finding the Fourth Proportional to 626.85, 860.40 and 571.23

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Solution

The fourth proportional to 626.85, 860.40 and 571.23 is: 784.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.85 : 860.40 = 571.23 : x
  2. Step 2: Convert to fraction form
    626.85/860.40 = 571.23/x
  3. Step 3: Cross multiply
    626.85x = 860.40 × 571.23
  4. Step 4: Simplify right side
    626.85x = 491,486.29
  5. Step 5: Solve for x
    x = 491,486.29/626.85
  6. Step 6: Final answer
    x = 784.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.