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Finding the Fourth Proportional to 1,121.94, 1,682.55 and 472.50

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Solution

The fourth proportional to 1,121.94, 1,682.55 and 472.50 is: 708.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.94 : 1,682.55 = 472.50 : x
  2. Step 2: Convert to fraction form
    1,121.94/1,682.55 = 472.50/x
  3. Step 3: Cross multiply
    1,121.94x = 1,682.55 × 472.50
  4. Step 4: Simplify right side
    1,121.94x = 795,004.88
  5. Step 5: Solve for x
    x = 795,004.88/1,121.94
  6. Step 6: Final answer
    x = 708.60

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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.