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Finding the Fourth Proportional to 790.48, 1,185.30 and 242.52

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Solution

The fourth proportional to 790.48, 1,185.30 and 242.52 is: 363.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.48 : 1,185.30 = 242.52 : x
  2. Step 2: Convert to fraction form
    790.48/1,185.30 = 242.52/x
  3. Step 3: Cross multiply
    790.48x = 1,185.30 × 242.52
  4. Step 4: Simplify right side
    790.48x = 287,454.51
  5. Step 5: Solve for x
    x = 287,454.51/790.48
  6. Step 6: Final answer
    x = 363.64

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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.