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Finding the Fourth Proportional to 2,920.79, 4,030.79 and 1,662.03

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Solution

The fourth proportional to 2,920.79, 4,030.79 and 1,662.03 is: 2,293.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.79 : 4,030.79 = 1,662.03 : x
  2. Step 2: Convert to fraction form
    2,920.79/4,030.79 = 1,662.03/x
  3. Step 3: Cross multiply
    2,920.79x = 4,030.79 × 1,662.03
  4. Step 4: Simplify right side
    2,920.79x = 6,699,285.59
  5. Step 5: Solve for x
    x = 6,699,285.59/2,920.79
  6. Step 6: Final answer
    x = 2,293.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.