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Finding the Fourth Proportional to 612.06, 918.09 and 611.16

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Solution

The fourth proportional to 612.06, 918.09 and 611.16 is: 916.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.06 : 918.09 = 611.16 : x
  2. Step 2: Convert to fraction form
    612.06/918.09 = 611.16/x
  3. Step 3: Cross multiply
    612.06x = 918.09 × 611.16
  4. Step 4: Simplify right side
    612.06x = 561,099.88
  5. Step 5: Solve for x
    x = 561,099.88/612.06
  6. Step 6: Final answer
    x = 916.74

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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.