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Finding the Fourth Proportional to 407.09, 610.65 and 118.50

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Solution

The fourth proportional to 407.09, 610.65 and 118.50 is: 177.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.09 : 610.65 = 118.50 : x
  2. Step 2: Convert to fraction form
    407.09/610.65 = 118.50/x
  3. Step 3: Cross multiply
    407.09x = 610.65 × 118.50
  4. Step 4: Simplify right side
    407.09x = 72,362.03
  5. Step 5: Solve for x
    x = 72,362.03/407.09
  6. Step 6: Final answer
    x = 177.76

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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.