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Finding the Fourth Proportional to 612.81, 845.69 and 360.72

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Solution

The fourth proportional to 612.81, 845.69 and 360.72 is: 497.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.81 : 845.69 = 360.72 : x
  2. Step 2: Convert to fraction form
    612.81/845.69 = 360.72/x
  3. Step 3: Cross multiply
    612.81x = 845.69 × 360.72
  4. Step 4: Simplify right side
    612.81x = 305,055.49
  5. Step 5: Solve for x
    x = 305,055.49/612.81
  6. Step 6: Final answer
    x = 497.80

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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.