Home / 1,680.30-2,318.81-934.23

Finding the Fourth Proportional to 1,680.30, 2,318.81 and 934.23

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Solution

The fourth proportional to 1,680.30, 2,318.81 and 934.23 is: 1,289.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.30 : 2,318.81 = 934.23 : x
  2. Step 2: Convert to fraction form
    1,680.30/2,318.81 = 934.23/x
  3. Step 3: Cross multiply
    1,680.30x = 2,318.81 × 934.23
  4. Step 4: Simplify right side
    1,680.30x = 2,166,297.20
  5. Step 5: Solve for x
    x = 2,166,297.20/1,680.30
  6. Step 6: Final answer
    x = 1,289.24

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1.5x scale

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.