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Finding the Fourth Proportional to 746.61, 1,119.18 and 380.97

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Solution

The fourth proportional to 746.61, 1,119.18 and 380.97 is: 571.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.61 : 1,119.18 = 380.97 : x
  2. Step 2: Convert to fraction form
    746.61/1,119.18 = 380.97/x
  3. Step 3: Cross multiply
    746.61x = 1,119.18 × 380.97
  4. Step 4: Simplify right side
    746.61x = 426,374.00
  5. Step 5: Solve for x
    x = 426,374.00/746.61
  6. Step 6: Final answer
    x = 571.08

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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.