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Finding the Fourth Proportional to 612.99, 851.74 and 605.16

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Solution

The fourth proportional to 612.99, 851.74 and 605.16 is: 840.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.99 : 851.74 = 605.16 : x
  2. Step 2: Convert to fraction form
    612.99/851.74 = 605.16/x
  3. Step 3: Cross multiply
    612.99x = 851.74 × 605.16
  4. Step 4: Simplify right side
    612.99x = 515,437.47
  5. Step 5: Solve for x
    x = 515,437.47/612.99
  6. Step 6: Final answer
    x = 840.86

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.