Home / 2,680.12-4,020.18-947.53

Finding the Fourth Proportional to 2,680.12, 4,020.18 and 947.53

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Solution

The fourth proportional to 2,680.12, 4,020.18 and 947.53 is: 1,421.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.12 : 4,020.18 = 947.53 : x
  2. Step 2: Convert to fraction form
    2,680.12/4,020.18 = 947.53/x
  3. Step 3: Cross multiply
    2,680.12x = 4,020.18 × 947.53
  4. Step 4: Simplify right side
    2,680.12x = 3,809,247.96
  5. Step 5: Solve for x
    x = 3,809,247.96/2,680.12
  6. Step 6: Final answer
    x = 1,421.30

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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.