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Finding the Fourth Proportional to 2,903.20, 4,354.81 and 711.93

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Solution

The fourth proportional to 2,903.20, 4,354.81 and 711.93 is: 1,067.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,903.20 : 4,354.81 = 711.93 : x
  2. Step 2: Convert to fraction form
    2,903.20/4,354.81 = 711.93/x
  3. Step 3: Cross multiply
    2,903.20x = 4,354.81 × 711.93
  4. Step 4: Simplify right side
    2,903.20x = 3,100,326.19
  5. Step 5: Solve for x
    x = 3,100,326.19/2,903.20
  6. Step 6: Final answer
    x = 1,067.90

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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.