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Finding the Fourth Proportional to 612.06, 917.64 and 287.25

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Solution

The fourth proportional to 612.06, 917.64 and 287.25 is: 430.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.06 : 917.64 = 287.25 : x
  2. Step 2: Convert to fraction form
    612.06/917.64 = 287.25/x
  3. Step 3: Cross multiply
    612.06x = 917.64 × 287.25
  4. Step 4: Simplify right side
    612.06x = 263,592.09
  5. Step 5: Solve for x
    x = 263,592.09/612.06
  6. Step 6: Final answer
    x = 430.66

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.