Home / 1,680.10-2,318.62-934.05

Finding the Fourth Proportional to 1,680.10, 2,318.62 and 934.05

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Solution

The fourth proportional to 1,680.10, 2,318.62 and 934.05 is: 1,289.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.10 : 2,318.62 = 934.05 : x
  2. Step 2: Convert to fraction form
    1,680.10/2,318.62 = 934.05/x
  3. Step 3: Cross multiply
    1,680.10x = 2,318.62 × 934.05
  4. Step 4: Simplify right side
    1,680.10x = 2,165,699.45
  5. Step 5: Solve for x
    x = 2,165,699.45/1,680.10
  6. Step 6: Final answer
    x = 1,289.03

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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.