Home / 1,680.45-2,318.99-934.40

Finding the Fourth Proportional to 1,680.45, 2,318.99 and 934.40

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Solution

The fourth proportional to 1,680.45, 2,318.99 and 934.40 is: 1,289.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.45 : 2,318.99 = 934.40 : x
  2. Step 2: Convert to fraction form
    1,680.45/2,318.99 = 934.40/x
  3. Step 3: Cross multiply
    1,680.45x = 2,318.99 × 934.40
  4. Step 4: Simplify right side
    1,680.45x = 2,166,847.99
  5. Step 5: Solve for x
    x = 2,166,847.99/1,680.45
  6. Step 6: Final answer
    x = 1,289.45

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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.