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Finding the Fourth Proportional to 612.12, 845.04 and 415.74

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Solution

The fourth proportional to 612.12, 845.04 and 415.74 is: 573.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.12 : 845.04 = 415.74 : x
  2. Step 2: Convert to fraction form
    612.12/845.04 = 415.74/x
  3. Step 3: Cross multiply
    612.12x = 845.04 × 415.74
  4. Step 4: Simplify right side
    612.12x = 351,316.93
  5. Step 5: Solve for x
    x = 351,316.93/612.12
  6. Step 6: Final answer
    x = 573.93

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