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Finding the Fourth Proportional to 613.71, 841.23 and 612.63

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Solution

The fourth proportional to 613.71, 841.23 and 612.63 is: 839.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.71 : 841.23 = 612.63 : x
  2. Step 2: Convert to fraction form
    613.71/841.23 = 612.63/x
  3. Step 3: Cross multiply
    613.71x = 841.23 × 612.63
  4. Step 4: Simplify right side
    613.71x = 515,362.73
  5. Step 5: Solve for x
    x = 515,362.73/613.71
  6. Step 6: Final answer
    x = 839.75

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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.