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Finding the Fourth Proportional to 2,178.65, 3,268.35 and 718.22

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Solution

The fourth proportional to 2,178.65, 3,268.35 and 718.22 is: 1,077.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.65 : 3,268.35 = 718.22 : x
  2. Step 2: Convert to fraction form
    2,178.65/3,268.35 = 718.22/x
  3. Step 3: Cross multiply
    2,178.65x = 3,268.35 × 718.22
  4. Step 4: Simplify right side
    2,178.65x = 2,347,394.34
  5. Step 5: Solve for x
    x = 2,347,394.34/2,178.65
  6. Step 6: Final answer
    x = 1,077.45

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1.5x scale

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.