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Finding the Fourth Proportional to 612.31, 845.34 and 376.35

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Solution

The fourth proportional to 612.31, 845.34 and 376.35 is: 519.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.31 : 845.34 = 376.35 : x
  2. Step 2: Convert to fraction form
    612.31/845.34 = 376.35/x
  3. Step 3: Cross multiply
    612.31x = 845.34 × 376.35
  4. Step 4: Simplify right side
    612.31x = 318,139.13
  5. Step 5: Solve for x
    x = 318,139.13/612.31
  6. Step 6: Final answer
    x = 519.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.