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Finding the Fourth Proportional to 207.18, 312.35 and 184.64

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Solution

The fourth proportional to 207.18, 312.35 and 184.64 is: 278.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.18 : 312.35 = 184.64 : x
  2. Step 2: Convert to fraction form
    207.18/312.35 = 184.64/x
  3. Step 3: Cross multiply
    207.18x = 312.35 × 184.64
  4. Step 4: Simplify right side
    207.18x = 57,669.82
  5. Step 5: Solve for x
    x = 57,669.82/207.18
  6. Step 6: Final answer
    x = 278.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.