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Finding the Fourth Proportional to 790.18, 1,185.17 and 242.74

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Solution

The fourth proportional to 790.18, 1,185.17 and 242.74 is: 364.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.18 : 1,185.17 = 242.74 : x
  2. Step 2: Convert to fraction form
    790.18/1,185.17 = 242.74/x
  3. Step 3: Cross multiply
    790.18x = 1,185.17 × 242.74
  4. Step 4: Simplify right side
    790.18x = 287,685.81
  5. Step 5: Solve for x
    x = 287,685.81/790.18
  6. Step 6: Final answer
    x = 364.08

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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.