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Finding the Fourth Proportional to 790.61, 1,185.93 and 242.73

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Solution

The fourth proportional to 790.61, 1,185.93 and 242.73 is: 364.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.61 : 1,185.93 = 242.73 : x
  2. Step 2: Convert to fraction form
    790.61/1,185.93 = 242.73/x
  3. Step 3: Cross multiply
    790.61x = 1,185.93 × 242.73
  4. Step 4: Simplify right side
    790.61x = 287,860.79
  5. Step 5: Solve for x
    x = 287,860.79/790.61
  6. Step 6: Final answer
    x = 364.10

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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.