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Finding the Fourth Proportional to 1,969.11, 2,953.61 and 928.86

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Solution

The fourth proportional to 1,969.11, 2,953.61 and 928.86 is: 1,393.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.11 : 2,953.61 = 928.86 : x
  2. Step 2: Convert to fraction form
    1,969.11/2,953.61 = 928.86/x
  3. Step 3: Cross multiply
    1,969.11x = 2,953.61 × 928.86
  4. Step 4: Simplify right side
    1,969.11x = 2,743,492.51
  5. Step 5: Solve for x
    x = 2,743,492.51/1,969.11
  6. Step 6: Final answer
    x = 1,393.27

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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.