Home / 1,680.62-2,319.21-934.55

Finding the Fourth Proportional to 1,680.62, 2,319.21 and 934.55

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Solution

The fourth proportional to 1,680.62, 2,319.21 and 934.55 is: 1,289.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.62 : 2,319.21 = 934.55 : x
  2. Step 2: Convert to fraction form
    1,680.62/2,319.21 = 934.55/x
  3. Step 3: Cross multiply
    1,680.62x = 2,319.21 × 934.55
  4. Step 4: Simplify right side
    1,680.62x = 2,167,406.11
  5. Step 5: Solve for x
    x = 2,167,406.11/1,680.62
  6. Step 6: Final answer
    x = 1,289.65

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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.